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ICHEP 2014

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Valencia, Spain

Valencia, Spain
Description
ICHEP is a series of international conferences organized by the C11 commission of the International Union of Pure and Applied Physics (IUPAP). It is held every second year since more than 50 years and is the reference conference of particle physics where most relevant results are presented.
The Spanish particle and astroparticle physics community is very proud to organize the 37th International Conference on High Energy Physics (ICHEP) in Valencia from 2 to 9 July 2014.
Paper
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  • Wednesday, 2 July
    • 15:00 → 20:00
      Registration
  • Thursday, 3 July
    • 08:00 → 09:30
      Registration
    • 09:30 → 10:30
      Welcome by Academic and Scientific Authorities Auditorium 1 ()

      Auditorium 1
      Convener: Prof. Juan Antonio Fuster Verdu (IFIC (Instituto de Fisica Corpuscular))
      • 09:30
        Chair of the Spanish Research Council (CSIC) 15m
        Speaker: Prof. Emilio Lora-Tamayo (CSIC)
      • 09:45
        Vicerector of the University of Valencia for Research and Scientific Policy 15m
        Speaker: Prof. PILAR CAMPINS FALCÓ (University of Valencia)
      • 10:00
        Chair of the Spanish Royal Society of Physics 15m
        Speaker: Prof. Adolfo Azcárraga (University of Valencia)
      • 10:15
        Spanish Scientific Manager for Particle Physics (MINECO) 15m
        Speaker: Prof. Francisco Del Águila (University of Granada)
    • 10:30 → 11:00
      Coffee 30m
    • 11:00 → 13:40
      Accelerator Physics and Future Colliders: session 1 Sala 1 ()

      Sala 1

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Dr. Frank Zimmermann (CERN)
      • 11:00
        Future Accelerators at the Particle Physics Frontier 25m
        A general overview of concepts, designs, technologies and future possibilities will be presented for energy and intensity frontier accelerators and colliders for particle physics in the next 50 to 100 years, offering a scientific, technical and fiscal risk-benefit analysis and strategies to move forward. The talk will discuss the near-, mid-, and long-term future options including various linear and circular colliders for lepton, hadron and lepton-hadron collisions (including the Future Circular Colliders (FCC) at CERN and its global equivalents elsewhere) and high intensity neutrino beams as well as an analysis of advanced acceleration schemes involving lasers, plasmas, crystals, etc. The important factors of energy consumption, efficiencies, capital and operating costs including a “green” agenda will be presented. Finally, alternative schemes to reach the high energy frontier relevant to “dark matter” and “dark energy” via non-accelerator laboratory-scale set-ups using cavities, atoms, lasers and plasmas will be explored.
        Speaker: Prof. Swapan Chattopadhyay (Cockcroft Institute)
        Slides
      • 11:25
        The High Luminosity LHC Project Status and Perspectives 25m
        The High Luminosity LHC project is now entering in the final stage of design. Aimed at improving the LHC reach in integrated luminosity for 300 to 3000 fb-1, the project relies on a few novelties: 1) use of a special optics, the achromatic telescopic squeeze to enhance beam matching and chromaticity correction beyond the present LHC possibility; use of advanced magnet technology based on Nb3Sn to double the inner triplet quadrupole aperture; use of RF crab cavities to rotate the beam at the collision points. Progress on these and other advanced technologies, being developed for managing the doubling of the beam current, will be reported; the last developments on the issue of pile up and pile up density will be reported, too. Finally an overview of the schedule and of project implementation will be discussed.
        Speaker: Prof. Lucio Rossi (CERN)
        Slides
      • 11:50
        The LHeC as a Higgs facility 25m
        The Large Hadron Electron Collider (LHeC) is a proposed facility for electron-proton/nucleus scattering at CERN, which will collide electrons and positrons from a new 60 GeV accelerator with the LHC beams. After the release of a detailed technical design report in 2012, the configuration of a linac with racetrack shape has been chosen for its default design. Further work to adapt the electron and high luminosity optics and beam parameters, allows to achieve performance levels around $10^34$ cm$^?2$ s$^?1$ required for precision Higgs physics. In parallel, work has focused on the design of an LHeC Test Facility at CERN, on the validation and preparation of the Energy Recovery Linac operation mode for the LHeC and on the development of the required Superconducting RF technologies. The talk presents an overview on the design, recent activities and an outlook for further developments.
        Speaker: Max Klein (University of Liverpool)
        Slides
      • 12:15
        Design of the Electron Ion Collider - eRHIC 25m
        We present a design of polarized electron - proton/He3+ and ion collider eRHIC in the present tunnel of the existing Relativistic Heavy Ion Collider (RHIC). Polarized electrons are accelerated up to the maximum energy of 21 GeV with a 1.334 GeV Energy Recovery Linac - ERL using two Non-Scaling Fixed Field Alternating Gradient (NS-FFAG) arcs. 70% polarized protons have an energy range 25-250 GeV, while the light ions (d, Si, Cu) and heavy ions (Au, U) have an energy range 10- 100 GeV/u, while the polarized He-3 ions 17-167 GeV/u. The ions (protons, He3+, ions) will be with a reduced emittance obtained by coherent electron cooling. Electron and ion beams collide with an angle of ~10 mrad, with a beta-squeeze of 5 cm luminosities above 10^34 can be reached by using the crab cavities.
        Speaker: Dr. DEJAN TRBOJEVIC (Brookhaven National Laboratory)
        Slides
      • 12:40
        Status and perspectives for PANDA at FAIR 15m
        The Facility for Antiproton and Ion Research (FAIR) is an international accelerator facility which will use antiprotons and ions to perform research in the fields of nuclear, hadron and particle physics, atomic and anti-matter physics, high density plasma physics, and applications in condensed matter physics, biology and the bio-medical sciences. It is situated in Darmstadt (Germany) and it is under construction. It is expected to provide beams to the experiments from 2018. FAIR will be based upon an expansion of the GSI Helmholtz Centre for Heavy Ion Research. Roughly 3,000 scientists from more than 50 countries are already working on the planning of the experiment and accelerator facilities. Among all projects which are under construction at FAIR in this moment, the PANDA experiment (Antiproton Annihilation at Darmstadt) will investigate fundamental questions of hadron and nuclear physics, studying the interactions of antiprotons with nucleons and nuclei. The physics program of PANDA is wide and ambitious: the hadron spectroscopy is one of the highlight physics topic, searching for gluonic excitations, charmonium and baryon spectroscopy, and D meson spectroscopy, which is interesting either from the point of view of the Strong and the Weak interactions; nucleon structure will be under investigation, with the study of parton distributions and the time-like form factor of the proton; then hadrons in matter and hypernuclei physics program are in the list of the topics under study as well. PANDA will focus attention on the phenomenon of the confinement of quarks and the generation of the hadron masses. Gluonic excitations and hadrons composed by strange and charm quarks could be abundantly produced and their features will be accessible with unprecedented accuracy, thereby allowing high precision tests of the strong interaction theory in the intermediate energy regime. PANDA is designed to reach mass resolution 20 times better than attained at the B factories, which is essential to extract the width of very narrow states (such as DsJ mesons) from the excitation function of the cross section of those. An overview of the PANDA experiment and the PANDA physics program will be presented. PANDA is designed for measurements of reactions induced by high intensity antiproton beams with a momentum between 1.5 GeV/c and 15 GeV/c interacting with hydrogen as well as nuclear targets. Basic subsystems of PANDA including magnets and target, tracking detectors, particle identification system, calorimeters and data acquisition are described. The technique to measure the width of very narrow states in Charm and Charmonium Physics will be presented in this context, stressing on what is the original contribution of PANDA in this field and how competitive these measurements are in comparison with other experiments.
        Speaker: Dr. Elisabetta Prencipe (IKP Forschungszentrum Juelich)
        Slides
      • 12:55
        Status of the NICA Project at JINR 15m
        The NICA (Nuclotron-based Ion Collider fAcility) project is now under active realization stage at the Joint Institute for Nuclear Research (JINR, Dubna). The main goal of the project is an experimental study of hot and dense strongly interacting matter in heavy ion (up to Au) collisions at centre-of-mass energies up to 11 GeV per nucleon. Two modes of operation is foreseen, collider mode and extracted beams, with two detectors: MPD and BM@N. In the collider mode expected average luminosity is 10E27 cm-2 s-1 for Au(79+). The fixed target experiment BM@N at the JINR superconducting synchrotron Nuclotron is in preparation stage. Extracted beams of various nuclei species with maximum momenta 13 GeV/c (for protons) will be available. The NICA project also foresees a study of spin physics with extracted and colliding beams of polarized deuterons and protons at the energies up to 26 GeV (for protons). The proposed program allows to search for possible signs of the phase transitions and critical phenomena as well as to shed light on the problem of nucleon spin structure.
        Speaker: Prof. Vladimir Kekelidze (Joint Institute for Nuclear Research, Dubna)
        Slides
      • 13:10
        Progress towards A Fixed-Target ExpeRiment at the LHC: AFTER@LHC 15m
        If used in the fixed-target mode, the multi-TeV LHC beams will allow the most energetic fixed-target experiments ever performed, including studies of high precision pp, pd and pA collisions at sqrt(s_NN) ~ 115 GeV as well as Pb-p and PbA collisions at sqrt(s_NN) ~ 72 GeV. In particular, AFTER@LHC -- for A Fixed-Target ExperRiment -- can greatly complement [1] existing collider experiments, in particular that of Brookhaven's Relativistic Heavy Ion Collider (RHIC) and the proposed electron-ion colliders (EIC). We thus discuss the conception of a multi-purpose fixed-target experiment with the proton or lead-ion LHC beams extracted by a bent crystal. This mature extraction technique, which is being studied as a smart collimator solution for the LHC [2], offers an ideal way to obtain a clean and very collimated high-energy beam, without altering the performance of the LHC [2-4]. We have shown that the instantaneous luminosity achievable with AFTER using typical targets would surpass that of RHIC by more than 3 orders of magnitude. This provides a quarkonium, prompt photon and heavy-flavour observatory [1, 5] in pp and pA collisions where, by instrumenting the target-rapidity region, gluon and heavy-quark distributions of the proton, the neutron and the nuclei can be accessed at large x and even at x larger than unity in the nuclear case. In addition, the fixed-target mode has the advantage to allow for spin measurements with a polarized target [6] and for access over the full backward rapidity domain up to x_F close to (-1) [7]. The nuclear target-species versatility provides a unique opportunity to study the nuclear matter versus the hot and dense matter formed in heavy-ion collisions. Modern detection technology will allow for the study of quarkonium excited states, in particular chi_c and chi_b resonances as well as exotic states such as the Z^c pentaquark and double-charmed baryons thanks to the boost of the fixed-target mode [8]. In this talk, we will also show the results of the first fast simulations based on a LHCb-like detector used in the fixed-target mode at LHC. We will also discuss the connection with existing and future data from the LHCb SMOG runs, which can be considered as a low-density internal gas target. References [1] S. J. Brodsky, F. Fleuret, C. Hadjidakis and J. P. Lansberg, Phys. Rept. 108 522 (2013) 239. [2] W. Scandale, et al. [LUA9 Collaboration], CERN-LHCC-2011-007, 2011. [3] E. Uggerhoj, U. I. Uggerhoj, Nucl. Instr. Meth. B 234 (2005) 31. [4] W. Scandale, it et al., Phys. Lett. B 703 (2011) 547-551. [5] J. P. Lansberg, S. J. Brodsky, F. Fleuret and C. Hadjidakis, Few Body Syst. 53 (2012) 11. [6] A. Rakotozafindrabe, et al., Phy. Part. Nucl. 45 (2014) 336 [arXiv:1301.5739 [hep-ex]]. [7] J. P. Lansberg, et al., EPJ Web Conf. 66 (2014) 11023 [arXiv:1308.5806 [hep-ex]]. [8] A. Rakotozafindrabe, et al., Nucl. Phys. A 904-905 (2013) 957c [arXiv:1211.1294 [nucl-ex]].
        Speaker: Dr. Andry Rakotozafindrabe (CEA Saclay, IRFU, France)
        Slides
      • 13:25
        Fermilab Accelerator Complex Proton Improvement Plan II 15m
        Fermilab has proposed a plan for upgrading the Fermilab proton accelerator complex using Superconducting Radio Frequency Linac that would deliver in excess of 1 MW proton beam to the neutrino production target at the initiation of the Long Baseline Neutrino Experiment. The plan is structured to deliver, in a cost effective manner, more than 1 MW of beam power to LBNE while creating a flexible platform for longer-term development of the Fermilab complex to multi-MW capabilities in support of a broader research program, as future resources become available.
        Speaker: Steve Brice (Fermilab)
        Paper
        Slides
    • 11:00 → 13:30
      Astroparticle Physics and Cosmology Auditorium 3A ()

      Auditorium 3A

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Dr. Esteban Roulet (CONICET)
      • 11:00
        First Results from POLARBEAR CMB Polarization Experiment 24m
        A large number of Cosmic Microwave Background (CMB) polarization experiments have been searching for the CMB B-mode polarization signatures, which were produced either in degree scales by primordial gravitational waves from the epoch of cosmic inflation or in sub-degree scales by gravitational lensing by cosmological large-scale structure. POLARBEAR is a ground-based experiment designed to measure CMB B-mode polarizations at both angular scales at the Atacama desert in Chile and started observing in the early 2012 at 150 GHz with an array of 1,274 polarization sensitive antenna-couple Transition Edge Sensor bolometers with a beam size of 3.5 arcminutes. In the first season observations, POLARBEAR focused on measuring the polarization signals in the small angular scales and detected gravitational lensing with the CMB polarization data alone for the first time. The first results from the first season observations of POLARBEAR are presented in this talk.
        Speaker: Haruki Nishino (Kavli IPMU)
        Slides
      • 11:24
        Dark energy, QCD axion, BICEP2, and trans-Planckian decay constant 18m
        To interpret DE as the potential energy of the approximate U(1) dark energy global symmetry, one must find color-anomaly free U(1). This necessarily invites to consider U(1)de symmetry together with U(1)PQ symmetry such that one gluon-anomaly free combination is constructed. This gives a hilltop potential of height GUT scale energy density. Since the recent BICEP2 result forbid the hilltop inflation, the chaoton is introduced to fit to the BICEP2 data at bull's eye. The DE symmetry, the PQ symmetry, and the Lyth bound are described from a unified view from string derived discrete symmetries.
        Speaker: Prof. Jihn E. Kim (Kyung Hee University)
        Slides
      • 11:42
        νΛMDM: A Model for Sterile Neutrino and Dark Matter Reconciles Cosmological and Neutrino Oscillation Data after BICEP2 18m
        We propose a ultraviolet complete theory for cold dark matter(CDM) and sterile neutrino that can accommodate both cosmological data and neutrino oscillation experiments at 1σ level. A new U(1)X dark gauge symmetry is introduced, and is assumed to be broken at ∼(MeV) scale. Such a light mediator for DM's self-scattering and scattering-off sterile neutrinos can resolve three controversies for cold DM on small cosmological scales, cusp vs. core, too-big-to-fail and missing satellites problems. We can also accommodate ∼ eV scale sterile neutrinos as the hot dark matter(HDM) and can fit some neutrino anomalies from neutrino oscillation experiments within 1σ. Finally the right amount of HDM can make a sizable contribution to dark radiation, and also helps to reconcile the tension between the data on the tensor-to-scalar ratio reported by Planck and BICEP2 Collaborations.
        Speaker: Pyungwon Ko (KIAS)
        Slides
      • 12:00
        Transplanckian masses in inflation 18m
        We postulate that the need of transplanckian masses that single field inflation seems to need to accomodate experimental data can be due to the fact that we "force" our scalar field to be minimally coupled to gravity. Although it is true that the field itself is a "dummy" variable and one is always free to make a field redefinition to the Einstein frame (where the field is minimally coupled) such a redefinition may not be innocent. It may be hiding for example non minimal couplings to gravity or modified gravity scenarios.
        Speaker: Prof. Gabriela Barenboim (University of Valencia and IFIC)
        Slides
      • 12:36
        Strong thermal leptogenesis and the $N_2$-dominated scenario 18m
        I will briefly review the main aims and concepts of leptogenesis, analysing different possible realisations. Particular attention will be devoted to the so-called $N_2$-dominated scenario, both in its unflavoured and flavoured versions. Its main features will be pointed out, as well as the impact of possible relevant corrections. I will then consider the conditions required by strong thermal leptogenesis, where the final asymmetry is fully independent of the initial conditions. Barring strong cancellations in the seesaw formula and in the flavoured decay parameters, I will show that strong thermal leptogenesis favours a lightest neutrino mass $m_1\gtrsim 10$~meV for normal ordering and $m_1\gtrsim 3$~meV for inverted ordering. Finally, I will comment on the power of absolute neutrino mass scale experiments to either support or severely corner strong thermal leptogenesis. This work is mainly based on JCAP 1403 (2014) 050
        Speaker: Mr. Michele Re Fiorentin (University of Southampton)
        Slides
      • 12:54
        Baryogenesis from dark matter annihilation 18m
        We will start with a brief overview of ways to explain the similarity between the energy content of baryons and dark matter in the Universe. Then we will focus on scenarios of baryogenesis from dark matter annihilation, outlining the main ingredients. Finally we will present a variation of these mechanisms that brings a connection between the baryon asymmetry, dark matter, and neutrino masses.
        Speaker: Dr. Jean Racker (IFIC)
        Slides
      • 13:12
        Flavour Covariant Formalism for Resonant Leptogenesis 18m
        Flavour effects play an important role in the statistical evolution of particle number densities. We present a fully flavour-covariant formulation of transport phenomena. As an application, we consider the heavy-neutrino and lepton flavour effects in Resonant Leptogenesis scenario, for which our formalism provides a complete and unified description.
        Speaker: Dr. P. S. Bhupal Dev (University of Manchester)
        Slides
    • 11:00 → 13:30
      BEH Physics: Standard Model Higgs Auditorium 1 ()

      Auditorium 1

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Prof. James Olsen (Princeton University)
      • 11:00
        Measurement of cross sections and couplings of the Higgs boson in the ZZ decay channel using the ATLAS detector 15m
        A review of the latest results on the measurment of the cross sections and couplings of the Higgs boson in the ZZ decay channel with the ATLAS detector is presented, using approximately 25 fb-1 of pp collision data collected at 7 TeV and 8 TeV in 2011 and 2012.
        Speaker: Prof. Gabriella Sciolla (Brandeis University)
        Slides
      • 11:15
        Measurements of Higgs boson production and properties in the ZZ decay channel with both Z’s decaying into electrons or muons using the CMS detector 15m
        A search for the Higgs boson has been carried out in the Higgs to ZZ to four leptons decay mode with the CMS detector at the LHC collider, where leptons are electrons or muons. The analysis is based on pp collision data collected at centre-of-mass energies of 7 and 8 TeV, corresponding to integrated luminosities of 5/fb and 20/fb, respectively. The analysis strategy and measurements of the mass, coupling, and spin-parity are reported.
        Speaker: Adish Vartak (University of California San Diego)
        Slides
      • 11:30
        Constraints on the Higgs boson width from off-shell production and decay to ZZ with the CMS detector 15m
        Constraints on the total Higgs boson width, Gamma_H, are presented using off-shell production and decay in the ZZ channel. The analysis is based on pp collision data collected at centre-of-mass energies of 7 and 8 TeV by the CMS experiment at the LHC, corresponding to integrated luminosities of 5/fb and 20/fb, respectively. The analyses are carried out in the ZZ to 4-lepton and to 2-lepton-2-neutrino channels, and constraints on the Higgs boson width are obtained.
        Speaker: Dr. Loic Quertenmont (Université catholique de Louvain)
        Slides
      • 11:45
        Higgs Boson Decays to Photons with the ATLAS Detector 15m
        A review of the latest results on Higgs boson decays to photons with the ATLAS detector is presented, using approximately 25 fb-1 of pp collision data collected at 7 TeV and 8 TeV in 2011 and 2012.
        Speaker: Ms. Sandrine Laplace (LPNHE / CNRS)
        Slides
      • 12:00
        Search for Higgs bosons decaying to photons in the CMS detector 20m
        A search for Higgs bosons has been carried out in the Higgs to gammagamma decay channel with the CMS detector at the LHC collider. In addition, a search for diphoton resonances at high mass using techniques similar to the SM Higgs boson search is presented. The analyses are based on pp collision data collected at centre-of-mass energies of 7 and 8 TeV corresponding to integrated luminosities of 5/fb and 20/fb, respectively. In the case of the SM Higgs boson search, the analysis strategy and measurements of the mass, coupling, and spin-parity are reported.
        Speaker: Dr. Matthew Kenzie (CERN)
        Paper
        Slides
      • 12:20
        Measurement of the Higgs boson mass with the ATLAS detector 15m
        The latest results on the measurement of the Higgs boson mass in the diphoton and ZZ decay channels with the ATLAS detector is presented, using approximately 25 fb-1 of pp collision data collected at 7 TeV and 8 TeV in 2011 and 2012.
        Speaker: Dr. Robert Harrington (University of Edinburgh)
        Slides
      • 12:35
        Precise measurement of the Higgs boson mass with the CMS detector 15m
        Using the high mass resolution channels H -> gamma gamma and H -> ZZ > 4 leptons, where the leptons are electrons or muons, a precise measurement of the Higgs boson mass is obtained. The analysis is based on pp collision data collected at centre-of-mass energies of 7 and 8 TeV, corresponding to integrated luminosities of 5/fb and 20/fb, respectively. The results together with strategy of the measurement and the methods to control the main systematic errors on the energy and momentum scale are discussed in detail.
        Speaker: Mr. Sani Matteo (University of California San Diego)
        Slides
      • 12:50
        Search for Higgs Bosons produced in association with top quarks with the ATLAS detector 20m
        Since the discovery of a Higgs boson by the ATLAS and CMS experiments at the LHC, the emphasis has shifted towards measurements of its properties and the search for less sensitive channels in order to determine whether the new particle is the Standard Model Higgs boson. Of particular importance is the direct observation of the coupling of the Higgs boson to top quarks. In this talk a review of ATLAS results on the search for the Higgs boson produced in association with top quarks, and on the search for flavour- changing neutral currents in top quark decays t -> qH (q = c, u), will be presented.
        Speaker: Dr. Elizaveta Shabalina (University of Goettingen)
        Slides
      • 13:10
        Search for Higgs bosons produced in association with top quarks in the CMS detector 15m
        Searches for a Higgs boson produced in association with top quarks, both singly and in pairs, and decaying to gamma gamma, ZZ, WW, tautau, and bbbar final states are presented. The analyses use pp collision data collected at center-of-mass energies of 7 and 8 TeV, corresponding to integrated luminosities of about 5/fb and 20/fb, respectively. No signals are observed for production of a Higgs boson in association with either one or two top quarks, and combined limits on the signal strength are presented.
        Speaker: Dr. Lorenzo Bianchini (ETH Zurich Institute for Particle Physics)
        Slides
    • 11:00 → 13:30
      Beyond the Standard Model Auditorium 2 ()

      Auditorium 2

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Juan Alcaraz Maestre (CIEMAT)
      • 11:00
        Inclusive SUSY searches at CMS 15m
        In this talk, the latest results from CMS on inclusive searches for squark and gluino production at the LHC are reviewed. A variety of complementary final state signatures and methods are presented using 20/fb of data from the 8 TeV LHC run.
        Speaker: Mr. Javier Duarte (California Institute of Technology)
        Slides
      • 11:15
        Inclusive searches for squarks and gluinos with the ATLAS detector 15m
        Despite the absence of experimental evidence, weak scale supersymmetry remains one of the best motivated and studied Standard Model extensions. This talk summarises recent ATLAS results on inclusive searches for supersymmetric squarks and gluinos, Results are presented for searches in final state events containing jets, missing transverse momentum, light leptons, taus or photons.
        Speaker: Dr. Jovan Mitrevski (Ludwig-Maximilians-Universität München)
        Slides
      • 11:30
        3rd generation squark searches at CMS 15m
        In this talk, the latest results from CMS on searches for stop and sbottom squarks are presented. Searches for direct 3rd generation squark production in a variety of decay channels are reviewed. The results are based on 20/fb of data collected during the 8 TeV LHC run.
        Speaker: Mr. Nickolas Mc Coll (UC Santa Barbara)
        Slides
      • 11:45
        Searches for direct pair production of third generation squarks with the ATLAS detector 15m
        Naturalness arguments for weak-scale supersymmetry favour supersymmetric partners of the third generation quarks with masses not too far from those of their Standard Model counterparts. Top or bottom squarks with masses less than a few hundred GeV can also give rise to direct pair production rates at the LHC that can be observed in the data sample recorded by the ATLAS detector. The talk presents recent ATLAS results from searches for direct stop and sbottom pair production.
        Speaker: Dr. Joao Firmino da Costa (CEA Saclay)
        Slides
      • 12:00
        Search for SUSY with extremely compressed spectra using the ATLAS and CMS detector 20m
        Searches that target SUSY with extremely compressed spectra are presented using the ATLAS and CMS detectors. This includes monojet signatures, with or without "c-tagging", as well as data taken with specially loose trigger conditions during the 8 TeV LHC run in 2012.
        Speaker: Dr. Robert Schoefbeck (HEPHY Vienna)
        Slides
      • 12:20
        How alive is constrained SUSY really? 15m
        Constrained SUSY models like the CMSSM might look less attractive nowadays because of fine tuning arguments. They also might look less probable in terms of Bayesian statistics. The question how well the model under study describes the data, however, is answered by frequentist p-values. Thus, for the first time, we calculate p-values for the CMSSM by performing dedicated toy experiments. We combine constraints from low-energy and astrophysical observables, Higgs mass and rate measurements as well as the non-observation of new physics in searches for supersymmetry at the LHC. Using the framework Fittino, we perform global fits of the CMSSM to the toy data. In this way we also derive estimates of the allowed ranges of parameters and observables in this model. Results using the well-established profile likelihood technique are shown in comparison.
        Speaker: Mr. Björn Sarrazin (Physikalisches Institut, Bonn University, Germany)
        Slides
      • 12:35
        Precision predictions for direct gaugino and slepton production at the LHC 15m
        The search for electroweak superpartners has recently moved to the centre of interest at the LHC. We provide the currently most precise theoretical predictions for these particles at NLO+NLL, use them to assess the precision of parton shower simulations, and reanalyse public experimental results assuming more general decompositions of gauginos and sleptons.
        Speaker: Prof. Michael Klasen (Institute for Theoretical Physics, University of Münster)
        Slides
      • 12:50
        Searches for electroweak production of supersymmetric charginos, neutralinos and sleptons with the ATLAS detector 15m
        Many supersymmetry models feature charginos, neutralinos and also sleptons with masses less than a few hundred GeV. These can give rise to direct pair production rates at the LHC that can be observed in the data sample recorded by the ATLAS detector. The talk presents results from searches for charginos, neutralinos and slepton production in final state events characterized by the presence of leptons, missing transverse momentum and possibly jets.
        Speaker: Dr. Andrée Robichaud-Véronneau (McGill University)
        Slides
      • 13:05
        Searches for Electroweak SUSY production at CMS 15m
        In this talk, the latest results from CMS on searches for supersymmetry produced through electroweak production channels are presented using 20/fb of data from the 8 TeV LHC run. A variety of complementary final state signatures and methods are used to probe gaugino and slepton production.
        Speaker: Dr. Owen Long (UC Riverside, United States)
        Slides
    • 11:00 → 13:30
      Detector RD and Performance Sala 6+7 ()

      Sala 6+7

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Francesco Forti (University and INFN, Pisa)
      • 11:00
        CMS Detector Performance 20m
        The performance of CMS detector during LHC Run 1 will be presented. Planned improvements for Run 2 will also be discussed.
        Speaker: Dr. Silvia Goy Lopez (CIEMAT)
        Slides
      • 11:20
        CMS upgrade perspectives 20m
        After the discovery of the Higgs boson, the Large Hadron Collider will resume operations in 2015 at 13 TeV aiming to collect over 300 fb$^{-1}$ by 2023, with design luminosity up to $2 \times 10^{34} cm^{-2} s^{-1}$. The success of the following major machine upgrade, HL–LHC, planned to achieve considerably higher annual integrated luminosity to achieve 3000 fb$^{-1}$ depends crucially on maintaining and improving the performance of the future CMS detector, under much more difficult operational conditions. An overview of the plans for CMS upgrades for HL-LHC will be presented.
        Speaker: Nadia Pastrone (INFN)
        Slides
      • 11:40
        ATLAS Upgrades for the next Decades 20m
        After the successful LHC operation at the center-of-mass energies of 7 and 8 TeV in 2010 - 2012, plans are actively advancing for a series of upgrades of the accelerator, culminating roughly ten years from now in the high luminosity LHC (HL-LHC) project, delivering of the order of five times the LHC nominal instantaneous luminosity along with luminosity leveling. The final goal is to extend the dataset from about few hundred fb−1 expected for LHC running to 3000 fb−1 by around 2035 for ATLAS and CMS. In parallel the experiments need to be keep lockstep with the accelerator to accommodate running beyond the nominal luminosity this decade. Current planning in ATLAS envisions significant upgrades to the detector during the consolidation of the LHC to reach full LHC energy and further upgrades. The challenge of coping with the HL-LHC instantaneous and integrated luminosity, along with the associated radiation levels, requires further major changes to the ATLAS detector. The designs are developing rapidly for a new all-silicon tracker, significant upgrades of the calorimeter and muon systems, as well as improved triggers and data acquisition. This report summarizes various improvements to the ATLAS detector required to cope with the anticipated evolution of the LHC luminosity during this decade and the next.
        Speaker: Dr. Carlos Lacasta (IFIC-Valencia)
        Slides
      • 12:00
        The ATLAS Trigger System: Past, Present and Future 20m
        The ATLAS trigger has been used very successfully for the online event selection during the first run of the LHC between 2009-2013 at a centre-of-mass energy between 900 GeV and 8 TeV. The trigger system consists of a hardware Level-1 (L1) and a software based high-level trigger (HLT) that reduces the event rate from the design bunch-crossing rate of 40 MHz to an average recording rate of a few hundred Hz. We will briefly review the performance of the ATLAS trigger system during the past data-taking period and point out the challenges for the trigger system during the next LHC run in early 2015 with a smaller bunch spacing, almost twice the centre-of-mass energy and higher peak luminosity. We will show the ongoing improvements and upgrades to the existing system that will ensure an even better performing trigger system despite the harsher machine conditions. This includes changes to the L1 calorimeter trigger, the introduction of a new L1 topological trigger module, improvements in the L1 muon system and the merging of the previously two-level HLT system into a single event filter farm. In addition, we will give an overview of the algorithmic improvements in the various HLT algorithms used to identify leptons, hadrons and global event quantities like missing transverse energy.
        Speaker: Dr. Francesca Pastore (Royal Holloway University of London (UK))
        Slides
      • 12:20
        ATLAS jet and missing ET reconstruction, calibration, and performance 20m
        ATLAS has achieved a very high precision on jet and missing transverse energy performance by the use of advanced calorimeter-based topological clustering and local cluster calibration, event-by-event pile-up subtraction methods, and in situ techniques to correct for the residual jet energy response difference between data and simulation. Tracking information is being combined with calorimeter to further improve the jet and missing ET performance. ATLAS has also commissioned several new powerful tools for for the analysis and interpretation of hadronic final states at the LHC such as jet substructure, jet mass, quark-gluon discrimination, and jet tagging tools for the identification of boosted heavy particles. An overview of the reconstruction, calibration and performance of jets, missing ET, and jet substructure and tagging at ATLAS is presented.
        Speaker: Peter Berta
        Slides
      • 12:40
        Performance of the reconstruction, calibration and identification of electrons and photons with the ATLAS detector, and their impact on the ATLAS physics results 20m
        The performance of the reconstruction, calibration and identification electrons and photons with the ATLAS detector at the LHC is a key component to realize the ATLAS full physics potential, both in the searches for new physics and in precision measurements. For instance, they all played a critical role in the discovery of a Higgs boson, announced by the ATLAS Collaboration in 2012, and in the measurement of its properties. We present a description of the algorithms used for the reconstruction and identification of electron and photons with the ATLAS detector, as well as results from the measurements of their efficiencies in pp collisions. The electron and photon energy calibration procedure is discussed, as well as its impact on the precise measurement of the Higgs boson mass.
        Speaker: Jean-Baptiste Blanchard
        Slides
      • 13:00
        Upgrade of the CMS instrumentation for luminosity and machine induced background measurements 15m
        To cope with the higher luminosity, higher energy and shorter bunch spacing of 25 ns at the LHC after 2014, an upgrade program is performed for the detectors to measure the luminosity and machine induced background. A new detector is the pixel luminosity telescope consisting of 8 telescopes, equipped with silicon pixel sensors, on both ends of the interactions point (IP). The Beam Conditions Monitoring system, using diamond sensors, is upgraded to 24 sensors, 12 on each end of the IP. In addition, dedicated fast ASICs in 130 nm technology and dead-time free backend electronics using FPGAs for fast signal processing are being developed and built. Also, the part of the forward HCAL used for the luminosity measurement is instrumented with new readout electronics, in uTCA standards. The machine induced background measurement will be supported by a new system of direction sensitive quartz Cherenkov counters, with excellent timing resolution. A data acquisition architecture is developed that is common for all subsystems and allows for synchronization across different hardware. The design of the new system will be presented, and a report will be given on the performance of each system measured in several test-beam campaigns and prototype operation in the last LHC run.
        Speaker: Dr. Anne Evelyn Dabrowski (CERN, Switzerland)
        Slides
      • 13:15
        Identification and energy calibration of hadronically decaying tau leptons with the ATLAS experiment. 15m
        The trigger and offline reconstruction, identification and energy calibration algorithms employed for hadronic decays of tau leptons for the data collected in 2012 with the ATLAS detector at the LHC operating at a center-of-mass energy of 8TeV are described. The performance of these algorithms is measured in most cases with Z decays to tau leptons. An uncertainty on the offline reconstructed tau energy scale of about 2-4% is achieved using two independent methods. The offline tau identification efficiency is measured with a precision of (2-3)% for hadronically decaying tau leptons with one associated track, and of (4-5)% for the case of three associated tracks, inclusive in η and for a visible transverse momentum greater than 20 GeV. Stability of the performance and through the data taking period is observed with respect to the number of concurrent proton-proton interactions.
        Speaker: Almut Pingel
        Slides
    • 11:00 → 13:30
      Education and Outreach Sala 2 ()

      Sala 2

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Ms. Marge Bardeen (Fermilab)
      • 11:00
        Cosmic-ray detectors for high-schools in France 15m
        Teaching particle physics at high-school level is always challenging, one issue being that there is no easy window onto the world of the “infinitely small”. Cosmic rays are therefore an invaluable tool to allow the students to sense the elementary particles and to understand the problems raised by their detection. In France, a collaboration started several years ago between the “Institut National de Physique Nucléaire et de Physique des Particules” (IN2P3) of the CNRS and “Sciences à l’Ecole”, a project from the French Education Ministry which is promoting science in high schools and higher education. Large cosmic ray detectors called “Cosmodétecteurs” are built in the Marseille IN2P3 laboratory (CPPM) and loaned to high school teachers selected by Sciences à l’Ecole. These teachers are trained prior to receiving the detector – a one week-long seminar at CERN, part of the High School Teacher program, plus a technical course in Marseille to learn how to use the apparatus. These teachers then exchange information through a dedicated internet forum and present the educational activities they develop with their Cosmodétecteur. There are currently 17 such detectors in France and 15 more will be released in 2014. These cosmic-ray detectors consist in three mobile plastic scintillators, each coupled to a photomultiplier. The scintillators can be arranged in different geometries in order to perform several complementary experiments (flux and angular distribution of the cosmic rays, Auger-like and Rossi shower experiment, etc.). In addition, one larger block of scintillator allows the measurement of the muon lifetime. These devices are operated over long periods in order to fully exploit their potential. Therefore, they usually remain several months in the same location, under the responsibility of reference teachers educating their colleagues about using them. The Cosmodétecteur is routinely used by these teachers as a part of their pedagogical projects. As an example, in the framework of the “Olympiades de Physique 2010”, a project based on a Cosmodétecteur has been awarded. IN2P3 is developing a different cosmic-ray detector, called COSMIX, which fits in a small case, is lighter and does not require any setting nor calibration – simply an USB power plug. This new detector, designed at the Gradignan IN2P3 laboratory (CENBG), uses spare scintillator bars from the Fermi satellite and custom electronics. It includes a GPS, a pressure-meter and a data acquisition system allowing data to be stored onto a SD memory card. Many applications are possible for this detector, of which about 15 copies will be produced this year: short introduction to cosmic rays in classrooms, demonstrations at the end of a public lecture or during an exhibit, etc. A collaborative website will allow participating teachers to publish their data while describing how they were acquired – one example: teachers from everywhere in France will be able to study the cosmic ray rates at the different floors of the Eiffel tower, hence reproducing Wulf’s experiment from 1909. The well-recognized Cosmodétecteur, combined with the IN2P3 physical and technical knowledge and the Sciences à l’Ecole educational expertise, will allow more and more high-school students and teachers to discover particle physics through cosmic rays. The new IN2P3 COSMIX detector is a different tool which offers new opportunities to provide an introduction to cosmic rays to audiences which do not have access to a Cosmodétecteur. All the related activities will be presented in the talk proposed in the “Education and Outreach” ICHEP 2014 parallel session.
        Speaker: Dr. Nicolas Arnaud (LAL (CNRS/IN2P3 and Université Paris Sud))
        Transparents
      • 11:15
        CERN@school: bringing CERN into the classroom 15m
        CERN@school [1] brings technology from CERN [2] into the classroom to aid with the teaching of particle physics. It also aims to inspire the next generation of physicists and engineers by giving participants the opportunity to be part of a national collaboration of students, teachers and academics, analysing data obtained from detectors based on the ground and in space to make new, curiosity-driven discoveries at school. CERN@school is based around the Timepix hybrid silicon pixel detector [3] developed by the Medipix Collaboration [4], which features a 300 μm thick silicon sensor bump-bonded to a Timepix readout ASIC. This defines a 256 × 256 grid of pixels with pitch 55 μm, the data from which can be used to visualise ionizing radiation in a very accessible way. Broadly speaking, CERN@school consists of a web portal that allows access to data collected by the Langton Ultimate Cosmic ray Intensity Detector (LUCID) experiment [5] in space and the student-operated Timepix detectors on the ground; a number of Timepix detector kits for ground-based experiments, to be made available to schools for both teaching and research purposes; and educational resources for teachers to use with LUCID data and detector kits in the classroom. By providing access to cutting-edge research equipment, raw data from ground and space-based experiments, CERN@school hopes to provide the foundation for a programme that meets the many of the aims and objectives of CERN and the project's supporting academic and industrial partners. The work presented here will provide an update on the current status of the programme as supported by the UK’s Science and Technology Facilities Council (STFC) and Royal Commission for the Exhibition of 1851. This includes recent results from work with the UK’s GridPP Collaboration [6] on using grid resources with schools to run GEANT4 [7] simulations of CERN@school experiments and integration with ArcGIS mapping software [8] to combine Timepix data with geographical information. Plans for expansion to other CERN member states will also be discussed. [1] http://cernatschool.web.cern.ch [2] http://cern.ch [3] X. Llopart et al., Nucl. Instr. Meth. A 581 (2007) 485-494 [4] http://medipix.web.cern.ch/ [5] L. Pinsky et al., Radiation Measurements 46 (2011) 1610-1614 [6] http://www.gridpp.ac.uk [7] A. Agostinelli et al., Nucl. Instr. Meth. A 506 (2003) 250-303 [8] https://www.arcgis.com
        Speaker: Dr. Tom Whyntie (Queen Mary, University of London)
        Slides
      • 11:30
        Questions and answers on extreme energy cosmic rays: A guide to explore the public data set of the Pierre Auger Observatory 10m
        The Pierre Auger Observatory is the largest extensive air shower detector, covering 3000 km² in Argentina. The observatory makes available, for educational and outreach purposes, 1% of its cosmic ray data set, which after 10 year of running corresponds to more than 30000 cosmic ray events. Several different proposals of educations activities have been developed within the collaboration and are available. We will focus on the activity guide we developed with the aim of exploring the rich education and outreach potential of cosmic rays with Portuguese high-school students. In this guide we use the Auger public data set as a starting point to introduce open questions on the origin, particle type and spectrum of high energy cosmic rays. To address them, the students learn about the air-shower cascade development, data reconstruction and its statistical analysis. The guide has been used both in the context of student summer internships at research labs and directly in schools, under the supervision of trained teachers and in close collaboration with Auger researchers. It is now available in Portuguese, English and Spanish.
        Speaker: Dr. Sofia Andringa (LIP)
        Slides
      • 11:40
        ATLAS Public Outreach - Content, Platforms and Strategy of ATLAS Education & Outreach 20m
        The ATLAS Education & Outreach program supports a wide variety of projects designed to communicate the goals and accomplishments of the ATLAS Experiment to the general public. Essential to the implementation of these projects are a well structured and current communication plan, an active core group with diverse expertise, and an engaged and imaginative collaboration. We present a small sampling of current projects, describe their goals, messages and target audiences, and then discuss how the Outreach program is supporting these projects. Detailed descriptions of the projects are presented separately in the accompanying poster session.
        Speaker: Dr. Steven Goldfarb (University of Michigan)
        Slides
      • 12:00
        Preparations for the public release of high-level CMS data 15m
        The CMS Collaboration is preparing for a public release up to a half of the reconstructed collision data collected in 2010, in accordance with its commitment to open access and data preservation. Efforts are at present focused on the usability of the data in education. The data will be accompanied by example applications tailored for different levels –– including ready-to-use web-based applications for histogramming or visualising individual collision events –– and a virtual machine image of the CMS software environment that is compatible with these data. The VM image will contain instructions for using the data with the online applications as well as examples of simple analyses. The novelty of this initiative is two-fold: In terms of open science, it lies in releasing the data in a format that is good for analysis; from an outreach perspective, it is to provide the possibility for people outside CMS to build educational applications using our public data. CMS will rely on services for data preservation and open access being prototyped at CERN with the input from CMS and the other LHC experiments.
        Speaker: Dr. Thomas McCauley (University of Notre Dame)
        Slides
      • 12:15
        “Café Científico”, “Wake up with Science”, really fun and interesting outreach activities 15m
        “Café Científico” is a series of relaxed discussions about different topics of interest related to research done at the UC that tries to connect research and society. This outreach activity allows people to ask/discuss/comment with the researcher while engaging with cutting-edge researchers from University of Cantabria. To avoid the formalism that the university space offers it is done in an alternative theatre of the city, Café de las Artes every last Friday of the month during the academic year. Since its beginning the public has progressively increased and now there is a group of fans. At the same time, we take on the same activity for children up to 16 years old: “Wake up with Science”. This activity is done at the university, to bring the kids to our environment. We introduce a subject for short time and then, let them ask any question that they have in mind about the subject. Previously, we send material to the teachers so they are prepared to have more knowledge about what they are about to hear. With this contribution we want to present a successful outreach activity, with two versions, adapted for participants age.
        Speaker: Mrs. ANA MARÍA MARÍN FARRONA (INSTITUTO DE FÍSICA DE CANTABRIA (IFCA))
        Slides
      • 12:30
        Collider - bringing the Large Hadron Collider to London, and beyond 15m
        On 12th November 2013 the Science Museum in London launched Collider, a major temporary exhibition about the Large Hadron Collider at CERN. The launch event was attended by Peter Higgs, Stephen Hawking, Rolf Heuer and the UK Chancellor of the Exchequer and attracted significant media attention and critical praise in the UK and internationally. By the time the exhibition completes its London run it will have attracted over 50,000 paying visitors and from May 2014 begins an international tour to museums in Europe, Asia and Australia. Developed with the support of CERN and targeted at a general audience, the exhibition uses techniques from theatre, video art and exhibition design to create the atmosphere of a visit to CERN, with the aim of engaging the public with the science, engineering and day-to-day reality of work at the LHC. Visitors are led through a series of theatrical reconstruction of spaces at CERN, including the main auditorium on the day the Higgs boson discovery was announced, the LHC tunnel and even the 1970s offices where much of the data analysis takes place. Authentic artefacts including superconducting magnets, components of the four main LHC experiments and a champagne bottle drank by Peter Higgs are set in context, telling physics, engineering and human stories. The exhibition also brings the community of CERN to life, through a dramatic re-imagining of events leading to the discovery of the Higgs boson and authentic video and audio recordings of engineers and physicists working on the LHC. We will present an account of the development of the exhibition, the new approaches used to engage the public with particle physics and the results of the audience research that has been conducted during the London run.
        Speaker: Dr. Harry Cliff (University of Cambridge & Science Museum, London)
        Slides
      • 12:45
        How can we turn a science exhibition into a really successfull outreach activity? 15m
        In April 2013, a CERN exhibition was shown in Santander: “The largest scientific instrument ever built”. Around the exhibition, were proposed several activities done by the researchers that work on the subjects: guided tours for children, younger and adults, workshops, film projections… In this form, the exhibition was visited by more than two thousand people, a complete success keeping in mind that Santander is a small city and its population is not used to take part in outreach activity. This contribution shows the way to take advantage of punctual science exhibitions and transform them into full outreach activities; touching more topics than just the exhibition itself and getting the interest, even in many the enthusiasm, for science. This first approach was repeated in a second exhibition about ESO with an enlarged response from the public that already had expectations.
        Speaker: Mrs. MARÍN ANA MARÍA (INSTITUTO DE FÍSICA DE CANTABRIA)
        Slides
      • 13:00
        Sciences ACO, a Museum of Light and Matter 15m
        Sciences ACO is a non-profit association based in Orsay (France). It manages a “Museum of Light and Matter” visited by more than 1,000 people each year. In this unique place, scientists and cultural mediators preserve, exhibit and explain pieces of the history of science & technology, to pass on the knowledge of this heritage to the audience. The museum is located at the centre of the “LAL-LURE accelerator complex”, which was awarded the “Historic Site” label by the European Physical Society last September. The main piece of Sciences ACO is indeed the “Anneau de Collisions d’Orsay” (ACO), a lepton storage ring whose operation started in 1965 and ended in 1988. ACO was first used as an electron-positron collider. It lead to important discoveries in accelerator physics and to many pioneering measurements of vector meson properties. In 1973, ACO became the first storage ring in Europe available to synchrotron light users. Ten years later, a free-electron laser was successfully operated at ACO – the second in the world, it was the first one in the visible bandwidth and the first at a storage ring. Rather than being decommissioned and disassembled like almost all accelerators in the world once they are turned off, ACO was carefully preserved by the very people who worked on it. The machine was later recognized as a French “historic monument” and the association, still very active, is now bringing three generations of scientists together. Sciences ACO visitors – among them there are many high school students and teachers – come to learn about the progress of science and the evolution of the technologies over more than four decades. As an example, a new room was recently opened in the museum to display the control room of the former LAL linear accelerator. This record of the seventies allows our guides not only to explain how this machine was operated and what its performances were, but also to shed light on the extraordinary advances of electronics and computing. Therefore, Sciences ACO is more than just a historical museum: it is a driving force for the development of outreach and pedagogical activities on the Paris Sud University campus and in the neighboring towns Moreover, real demonstration apparatuses – like the “Electrons’ ronde”, probably the world’s smallest interactive electron storage ring model – are being designed by engineering experts from the association, while virtual visits are being developed to enrich the visitors experience. All of this has been obtained by a small group of dedicated individuals, within the limited financial resources of the association. The history, the present activity and the prospects of Sciences ACO will be presented in the talk proposed in the “Education and Outreach” ICHEP 2014 parallel session.
        Speaker: Dr. Nicolas Arnaud (LAL (CNRS/IN2P3 and Université Paris Sud))
        Transparents
      • 13:15
        Phantom of the Universe: A State-of-the-Art Planetarium Show on Dark Matter 15m
        Phantom of the Universe is a planetarium show premiering late summer 2014 that will showcase an exciting exploration of dark matter, from the Big Bang to the Large Hadron Collider. The show will reveal the first hints of its existence through the eyes of Fritz Zwicky. Viewers will marvel at the astral choreography witnessed by Vera Rubin in the Andromeda galaxy. They will plummet deep underground to see the most sensitive dark matter detector on Earth. From there, they will end the journey at the Large Hadron Collider, speeding alongside particles before they collide in visually stunning explosions of light and sound, and learning how scientists around the world are collaborating to track down the constituent of dark matter. The show will be offered to planetariums worldwide free of charge. It will feature music composed by Mickey Hart (Apocalypse Now, The Twilight Zone, The Grateful Dead) and narration by Academy-Award winning actress Tilda Swinton, and showcase the creativity and directing prowess of Joao Pequenao and the writing and producing talents of award-winning filmmaker, Carey Ann Strelecki.
        Speaker: Dr. Michael Barnett (Lawrence Berkeley National Lab)
        Slides
    • 11:00 → 13:30
      Neutrino Physics: Neutrinoless Double Beta Decay Auditorium 3B ()

      Auditorium 3B

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Dr. silvia capelli (universita` degli Studi e Sezione INFN di Milano Bicocca)
      • 11:00
        The GERDA Experiment for the Search of Neutrinoless Double Beta Decay 13m
        The search for neutrinoless double beta decay ($0\nu\beta\beta$) is playing since two decades a major role in astroparticle physics. The discovery of this process would demonstrate the violation of lepton number conservation and the presence of a Majorana term in the neutrino mass. The GERmanium Detector Array ({\sc{gerda}}) experiment, located at the Gran Sasso underground laboratory in Italy, is one of the leading experiments for the search of $0\nu\beta\beta$ decay in $^{76}$Ge. The first data taking (Phase I) took place between November 2011 and June 2013. With a $\approx 21~\rm kg \cdot yr$ exposure and a background index (BI) at {{$\text{Q}_{\beta\beta}$}}~of $1.1\cdot10^{-2}$~{{$\rm cts/(kg \cdot yr \cdot keV)$}} after pulse shape discrimination, {\sc{gerda}}~Phase I set a limit on the $0\nu\beta\beta$ decay half life of $T_{1/2}^{0\nu} > 10^{25}~\rm yr~(90\%\mathrm{C.L.})$. The setup is now being upgraded for the Phase II of the experiment. A final sensitivity on $0\nu\beta\beta$ decay half life up to $2\cdot10^{26}$~yr can be obtained with an exposure of $100~\rm kg \cdot yr$ and a BI of $10^{-3}$~{{$\rm cts/(kg \cdot yr \cdot keV)$}}. The main strategies for reaching this are the use of the newly developed Broad Energy Germanium detectors (BEGe), with enhanced energy resolution and pulse shape discrimination capabilities, and the installation of an active veto in the liquid argon surrounding the germanium crystals for the recognition of external background events. In this talk, a review of the {\sc{gerda}}~Phase I results will be given, followed by a report on the ongoing operations for the preparation of Phase II.
        Speaker: Mr. Giovanni Benato (University of Zurich)
        Slides
      • 11:30
        Latest results from KamLAND-Zen second phase 13m
        KamLAND-Zen is an experiment for neutrinoless double beta decay search with xenon 136 based on large liquid scintillator detector KamLAND. The first phase of the experiment was operated from Oct. 12, 2011 to June 14, 2012 and we set lower limit for the neutrino-less double beta decay half-life , T1/2(0nu) > 1.9*10^{25} yr. The combined result of KamLAND-Zen and EXO data give T1/2(0nu) > 3.4*10^{25} yr. At the first phase, we found problematic background, 110mAg. Then we purified liquid scintillator and xenon gas by distillation to remove the background. The purification campaign was started just after the first phase and ended at Dec. 2013. We present the progress of background rejection, current status and latest results from KamLAND-Zen second phase.
        Speaker: Dr. Yoshihito Gando (Research Center for Neutrino Science, Tohoku Univ.)
        Slides
      • 11:45
        Neutrinoless double beta decay with EXO-200 13m
        See attached PDF for proper formatting. EXO-200 is one of the most sensitive searches for neutrinoless double beta decay in the world. The experiment uses 175 kg of enriched liquid xenon in an ultralow background time projection chamber installed at the Waste Isolation Pilot Plant, a salt mine with a 1600 m water equivalent overburden. This detector has demonstrated excellent energy resolution and background rejection capabilities. Using the first two years of data, EXO-200 has set a limit of 1.1x1025 yr at 90% C.L. on the neutrinoless double beta decay half-life of Xe-136.
        Speaker: Prof. Michelle Dolinski (Drexel University)
        Slides
      • 12:00
        Status of the NEXT experiment 13m
        Neutrinos may be Majorana particles. If so, neutrinoless double beta decay processes could be observed by the next-generation bb0nu experiments. I will briefly discuss one of the most promising ideas in the field, the use of a High Pressure Gas Xenon TPC (HPGXe) with electroluminescence gain and optical readout. A 100 kg incarnation of such a device will start operations at the Canfranc Underground Lab in Spain in 2015. The technology can be extrapolated to 1 ton, and thus lead the exploration of the inverse hierarchy in Majorana landscape.
        Speaker: juan jose gomez cadenas (IFIC)
        Slides
      • 12:15
        The SNO+ Experiment for Neutrinoless Double Beta Decay 13m
        The SNO+ experiment will employ 780 tonnes of liquid scintillator to explore a variety of fundamental physics. Chief amongst these will be a sensitive search for neutrinoless double beta decay, to be achieved by loading 130Te into the scintillator using a new technique. A combination of purification, passive shielding and background tagging is expected to leave 8B solar neutrinos and 2nbb decays as the dominant backgrounds in the region of interest, allowing us to achieve a sensitivity near the top of the inverted neutrino mass hierarchy with an initial 0.3% loading. Recent progress suggests that loadings of several percent or more are achievable and could permit a reach approaching the bottom of the inverted hierarchy in the near future. With the initial water fill underway, the status and prospects for the project will be reviewed.
        Speaker: Dr. Valentina Lozza (TU Dresden)
        Slides
      • 12:30
        Status of the CUORE and results from the CUORE-0 neutrinoless double beta decay experiments 13m
        CUORE is a 741 kg array of TeO2 bolometers for the search of neutrinoless double beta decay of Te-130. The detector is being constructed at the Laboratori Nazionali del Gran Sasso, Italy, where it will start taking data in 2015. If the target background of 0.01 counts/(keV kg y) will be reached, in five years of data taking CUORE will have an half life sensitivity of about 10^26 y. CUORE-0 is a smaller experiment constructed to test and demonstrate the performances expected for CUORE. The detector is a single tower of 52 CUORE-like bolometers that started taking data in spring 2013. The status and perspectives of CUORE will be discussed, and the first CUORE-0 data will be presented.
        Speaker: Dr. Monica Sisti (Università degli Studi di Milano-Bicocca and INFN Milano-Bicocca)
        Slides
      • 12:45
        Current status and perspectives of the LUCIFER experiment 13m
        The quest for Neutrinoless Double Beta Decay ($0\nu$DBD) represents one of the most promising ways to investigate the neutrino mass nature, Dirac or Majorana. A convincing detection claim demands for detectors with excellent energy resolution and almost zero background in the energy region of interest. These features can be obtained with the approach of the LUCIFER project, funded by an European grant, which is based on the double read–out of the heat and scintillation light produced by ZnSe scintillating bolometers. The resulting identification and rejection of the $\alpha$ interactions, as well as the large Q-value of the emitter, will guarantee a background lower than $10^{-3}$~counts/keV/kg/y in the energy region of the $0\nu$DBD of $^{82}$Se, an order of magnitude lower with respect to the present generation experiments. Despite the small mass of $\sim$17~kg, LUCIFER will reach a 90$\%$ CL sensitivity of 0.6$\times$10$^{26}$~y on the half-life of the decay.\\ We describe the current status of the project, including results of the recent R$\&$D activity.
        Speaker: Dr. Filippo Orio (INFN - Sezione di Roma)
        Slides
      • 13:00
        Scintillating bolometers based on ZnMoO4 and Zn100MoO4 crystals to search for 0nu2b decay of 100Mo (LUMINEU project): first tests at the Modane Underground Laboratory 13m
        Neutrinoless double beta (0nu2b) decay is a powerful tool to investigate neutrino properties, weak interaction, and effects beyond the Standard Model of particle physics. The main aim of the LUMINEU project (Luminescent Underground Molybdenum Investigation for NEUtrino mass and nature) is to realize a pilot experiment to search for 0nu2b decay of 100Mo with the help of zinc molybdate (ZnMoO4) crystals operated as scintillating bolometers and to demonstrate prospects of this technique for a next large scale 0nu2b experiment to probe the inverted neutrino mass hierarchy. First results of measurements with a 313 g ZnMoO4 crystal installed in the low-background EDELWEISS set-up at the Modane Underground Laboratory (LSM, France) show high energy resolution (FWHM = 9 keV at 2615 keV) and excellent rejection efficiency from alpha particles in the region of interest (above 2.6 MeV) by using the light and the heat signals. The radiopurity of the ZnMoO4 sample, derived from the 851 h data of the low background test, satisfies the LUMINEU goals: trace internal contamination is related with 210Po at the level of 0.62(3) mBq/kg, 226Ra (0.026(5) mBq/kg), and 228Th (0.010(3) mBq/kg), while only limits on the activity of other naturally occurring alpha radionuclides (from U/Th families, 147Sm and 190Pt) were set in the range of 0.003–0.014 mBq/kg. In December 2013 improved ZnMoO4 cylindrical crystals, with size D50 x 40 mm and mass 334 and 336 g, have been produced by recrystallization using the low-thermal-gradient Czochralski technique from molybdenum purified by double recrystallization from aqueous solutions. Moreover, a zinc molybdate crystal from enriched 100Mo (Zn100MoO4) was successfully grown for the first time. Two samples cut from the Zn100MoO4 boule (with mass 59 and 63 g) were tested as scintillating bolometers at the Centre de Sciences Nucléaires et de Sciences de la Matière (Orsay) with satisfactory results, and then installed in the EDELWEISS set-up at the LSM. First results of the low background measurements with the new LUMINEU detectors, as well as prospects of scintillating bolometers array based on 48 Zn100MoO4 crystals (which contain ~ 10 kg of enriched 100Mo) and located in the EDELWEISS set-up will be presented.
        Speaker: Dr. Denys Poda (Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM))
        Slides
      • 13:15
        Latest results of NEMO-3 experiment and present status of SuperNEMO 13m
        The NEMO-3 experiment looked for neutrinoless double beta decay processes from 2003 to 2011 at the Modane Underground Laboratory. Seven isotopes were studied by the simultaneous recording of the energy and track of the event, standing out 100-Mo and 82-Se since they were the most massive ones. No evidence for neutrinoless double beta decay has been observed, leading to set limits on the effective neutrino mass that are among the best to date, specially for the mentioned isotopes. In addition to the results regarding the effective neutrino mass, NEMO-3 results have shown the physics potential of the “tracking + calorimetry” technique for the neutrinoless double beta decay search, specially in terms of background rejection capabilities in the energy region of interest. For this reason, the SuperNEMO experiment has been conceived using this technique as one of the so-called new generation experiments. SuperNEMO is at present under construction after a R&D phase (started in 2007) which concluded that all the requirements are achievable. First phase is the construction of a first module that has been started in 2012 and will finish during 2015, when the data taking is expected to start. A summary of the latest NEMO-3 results, as well as the present status of the SuperNEMO progress (which includes, for example, the development of outstanding detectors for materials radiopurity and radon concentration measurements), will be presented, together with collaboration prospects about the installation, commissioning and operation of the experiment.
        Speaker: Dr. Hector GOMEZ MALUENDA (Laboratoire de l'Accélérateur Linéaire (LAL))
        Slides
    • 11:00 → 13:30
      Strong Interactions and Hadron Physics: Hard QCD - higher order calculations Sala 8+9 ()

      Sala 8+9

      Allocated time include time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Mr. Sven-Olaf Moch (Univ. Hamburg)
      • 11:00
        QCD at NNLO and beyond 25m
        I review the current status of higher-order calculations in perturbative QCD, with special regards to recent developments, and process of interest for physics at the LHC.
        Speaker: Dr. Claude Duhr (Durham University)
        Slides
      • 11:25
        Automated tools for QCD calculations 25m
        I review recent progress in the development of automated tools for QCD calculations, especially at NLO, and their application to LHC processes.
        Speaker: Dr. Simon Badger (CERN)
        Slides
      • 11:50
        NLO QCD corrections to triple collinear splitting functions 15m
        We present splitting functions in the triple collinear limit at next-to-leading order in the strong coupling. We performed the computation in the context of massless QCD+QED, and consider first collinear processes which include at least one photon. The IR divergent structure of the multi-partonic splitting functions agrees with the Catani's formula. Consistency checks based on symmetry arguments have been implemented and results for different configurations have been cross-checked. Studying photon-started processes, we obtained very compact results which led us to conclude that it is not possible to generalize crossing-like identities involving the parent parton.
        Speaker: Mr. Germán Sborlini (IFIC and Universidad de Buenos Aires)
        Slides
      • 12:05
        The loop-tree duality method at NLO and beyond 15m
        The duality theorem provides a relationship between loop integrals and phase space integrals, such that virtual and real corrections in perturbative higher order calculations can be recast into a form which is suitable for a simultaneous simulation. We summarize recent developments of the loop-tree duality method at one-loop and higher orders.
        Speaker: Dr. German Rodrigo (IFIC Valencia)
        Slides
      • 12:20
        GoSam: Automated One-loop Calculations within the Standard Model and Beyond 15m
        In this talk I will present the recent developments of the GoSam package, an automated tool for one-loop calculations. I will give a short introduction and explain the most recent features and developments. Furthermore, phenomenological applications and results are presented.
        Speaker: Nicolas Greiner (Max-Planck Institute for Physics)
        Slides
      • 12:35
        Searching for extremely rare W decays at the LHC 15m
        A gigantic number of W bosons will be produced by the LHC during its lifetime, opening up the possibility of making the first measurements of some extremely rare decay modes of this particle. The decay W -> Pi Gamma has been previously searched for at LEP and the Tevatron, and these experiments already placed limits on the branching ratio approaching the standard model prediction, which is in the range ~10^-6 to ~10^-8. I will discuss the theoretical issues and motivation for the observation of this and similar decays of the W boson, and present an estimate of the LHC reach for these measurements.
        Speaker: Dr. Tom Melia (CERN)
        Slides
      • 12:50
        Next-to-leading order QCD corrections to five jet production at the LHC 15m
        We present theoretical predictions for five jet production in proton-proton collisions at next-to-leading order accuracy in QCD. Inclusive as well as differential observables are studied for collision energies of 7 and 8 TeV. In general the next-to-leading order corrections stabilize the theoretical predictions with respect to scale variations. In case of the inclusive jet cross sections, we compare with experimental data where possible and find reasonable agreement. We observe that the four-to-three and five-to-four jet ratios show better perturbative convergence than the known three-to-two ratio and are promising candidates for future alpha_s measurements. Furthermore, we present a detailed analysis of uncertainties related to parton distribution functions. For the computation of the full colour virtual seven-point matrix elements, we use a generalised d-dimensional unitarity framework implemented in the publicly available library NJet.
        Speaker: Dr. Benedikt Biedermann (Universität Würzburg)
        Slides
      • 13:05
        Diphoton isolation studies 15m
        Diphoton production is the main background in searches and studies (performed at the LHC) for a low mass Higgs boson, decaying in a pair of photons. And for this reason, it is desirable to count with the best theoretical tool to describe this background. In this talk we will present a detailed study on the photon isolation prescriptions, together with a "tight isolation accord" in order to compare experimental data and theoretical calculations obtained at the highest possible perturbative order. Finally we'll show a comparison between theory and the LHC and Tevatron data, and we'll discuss why the NNLO is necessary in order to understand the phenomenology of this process.
        Speaker: Dr. Leandro Cieri (La Sapienza, Università di Roma)
        Slides
    • 11:00 → 12:30
      Top-quark and ElectroWeak Physics: Top pair production Sala 3+4 ()

      Sala 3+4

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Conveners: Dr. Maria Jose Costa (IFIC), Dr. Roberto Chierici (CNRS)
      • 11:00
        Top-quark pair production at hadron colliders: differential cross section and phenomenological applications with DiffTop 13m
        We study heavy-flavor production at hadron colliders and present phenomenological results for the differential top-quark pair production cross section calculated in perturbative QCD at approximate next-to-next-to-leading order (NNLO) $O(\alpha_s^4)$. Methods of threshold resummation in QCD are utilized for this calculation which is implemented in the computer code \textsc{Difftop}. Transverse momentum and rapidity distributions of final-state top quarks are computed at the LHC center-of-mass energies and compared to recent measurements of the CMS and ATLAS collaborations, which are found to be in very good agreement.
        Speaker: Dr. Marco Guzzi (DESY Hamburg)
        Slides
      • 11:15
        Top quark pair production cross section using the ATLAS detector at the LHC 13m
        Measurements of the inclusive top quark pair production cross sections in proton-proton collisions with the ATLAS detector at the Large Hadron Collider are presented. The measurements are performed requiring one or two electrons or muons in the final state. Various experimental techniques are compared. The most accurate result requires opposite sign electrons and muons achieves a precision of a few percent and is in good agreement to a recent NNLO+NNLL QCD calculation. In addition, a differential measurement of the top transverse momentum and kinematic properties of the top pair system are presented. This measurement requires one electron or muon in the final state and probes our understanding of top pair production in the TeV regime and is compared to recent Monte Carlo generators implementing LO and NLO matrix elements matched with parton showers and fixed order NLO QCD calculations. The data show sensitivity to parton density functions.
        Speaker: Mr. Timothée Theveneaux-Pelzer (LPC Clermont-Ferrand - CNRS/IN2P3)
        Slides
      • 11:30
        Simultaneous measurements of ttbar, WW an Z->tau+tau productions with the ATLAS detector 13m
        A global test of these Standard Model predictions is presented through the study of the common final state made up of a pair of an oppositely charged electron and muon in proton-proton collisions at sqrt(s) = 7 TeV recorded by the ATLAS detector at the LHC. The simultaneous measurement of the cross-sections of the pair production of top quarks, tau-leptons via Drell-Yan, and WW bosons is performed. The simultaneous extraction of the cross-sections is performed in a two-dimensional phase space spanned by missing transverse momentum and jet multiplicity. This analysis allows for a broader test of the Standard Model than that given by dedicated cross-section measurements providing the underlying correlations in the predicted and measured cross-sections due to common proton parton distribution functions parameters. This measurement can help to improve predictions of interaction cross-sections in hadron collisions.
        Speaker: Dr. Antonio Limosani (University of Sydney)
        Paper
        Slides
      • 11:45
        Measurements of the top quark pair production cross section in pp collisions with CMS 13m
        Result of merged abstracts: Precision measurements are presented of the top-quark pair inclusive production cross section in proton-proton collisions at the LHC at centre-of-mass energies of 7 TeV and 8 TeV. The data are collected with the CMS experiment during the years 2011 and 2012. The analyses include all top quark pair final states with the exception of events with two tau-leptons in the final state. In most analyses b-jet identification is used to increase the purity of the selection. The backgrounds are determined using data-driven techniques. The results are combined with each other and compared with theory predictions. Full NNLO+NNLL QCD predictions for the cross section of top-quark pair production are used together with different parton distribution functions (PDFs) to extract the strong coupling constant, alpha_S, from the cross section measured by the CMS experiment in proton-proton collisions at a center-of-mass energy of 7 TeV.
        Speaker: Lukas Baeni (ETH Zurich (CH))
        Slides
      • 12:00
        Study of additional radiation in top pair events using the ATLAS detector at the LHC 13m
        The large centre-of-mass energy available at the proton-proton collider LHC allows for the copious production of top quark pairs in association with other final state particles at high transverse momentum. The ATLAS experiment has measured several final state observables that are sensitive to additional parton radiation in top anti-top quark final states. Examples are the multiplicity of jets for various transverse momentum thresholds or the probability to emit jets above a given threshold in a fixed rapidity region. These measurements are compared to modern Monte Carlo generators based on NLO QCD matrix element or LO multi-leg matrix elements. The data are able to constrain the uncertainty on the modelling of the top pair production mechanism. We also discuss top production in association with photons and Z bosons. In addition, the production of top quark pairs in association with heavy quarks (beauty and charm) is presented.
        Speaker: Douglas Benjamin (Duke University)
        Slides
      • 12:15
        Measurement of differential cross sections in top pair production in pp collisions with CMS 13m
        Differential top quark pair production cross sections are measured in proton-proton collisions at the LHC at centre-of-mass energies of 7 and 8 TeV, using data collected by the CMS experiment in the years 2011 and 2012. The differential cross sections are measured as functions of various kinematic observables, including the transverse momentum and rapidity of the (anti)top quark and the top-antitop system and the jets and leptons of the event final state. Multiplicity and kinematic distributions of the jets produced in addition to the top pair are investigated. First measurements of the associate production of top quark pairs with vector bosons and with additional b-quarks in the final state are also presented.
        Speaker: Mr. Ivan Asin Cruz (DESY (Germany))
        Slides
    • 12:30 → 13:30
      Top-quark and ElectroWeak Physics: Single top production Sala 3+4

      Sala 3+4

      Valencia, Spain

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Conveners: Dr. Maria Jose Costa (IFIC), Dr. Roberto Chierici (CNRS)
      • 12:30
        Single top quark production at CDF 20m
        We present the most recent CDF measurements of single top quark production cross section. We also present the measurements of single top quark production in s-channel and t-channel separately. The extraction of the CKM matrix element |V_tb| from the single top quark cross section is discussed as well.
        Speaker: Dr. Sandra Leone (INFN Pisa)
        Slides
      • 12:50
        Measurement of the single top quark production cross section with the D0 detector 20m
        We present measurements of the cross sections for the two main production modes of single top quarks in pp(bar) collisions at a center-of-mass energy of 1.96 TeV in the Run II data collected with the D0 detector at the Fermilab Tevatron Collider. For this measurement the full D0 data set corresponding to an integrated luminosity of 9.7 fb−1 is used. We present the evidence of the s-channel production with a significance of 3.7 standard deviations. We also present an updated measurement of the production cross section of t- and s+t-channels. Using these measurements we set a lower limit on the CKM matrix element |Vtb| > 0.92 at 95% C.L., assuming m(top) = 172.5 GeV. We also report the first observation of single top quark production in the s-channel through the combination of the CDF and D0 measurements with a significance of 6.3 standard deviations.
        Speaker: Prof. Christian Schwanenberger (University of Manchester)
        Slides
      • 13:10
        Measurement of single top quark production in pp collisions at CMS 20m
        Result of abstract merging: Measurements are presented of t-channel single top quark production in proton-proton collisions at the LHC at centre-of-mass energies of 7 and 8 TeV, using data collected with the CMS experiment during the years 2011 and 2012. The analyses consider decay channels where the W from the top decays into electron-neutrino or muon-neutrino, and makes use of kinematic characteristics of electroweak single top production for the separation of signal from backgrounds using multivariate methods. The results are compared with the most precise standard model theory predictions. Measurements of top/antitop cross section ratio and of various differential single top quark production cross sections are also presented. Measurements of single top quark production in the tW-channel in pp collisions are presented. In the tW-channel a top quark is produced in association with a W boson. The data were collected in the years 2011 and 2012 at centre-of-mass energies of 7 and 8 TeV. The experimental signature is similar to top pair production, and there is interference at higher orders between the two processes. The measurements are perfomed using final states in which the associated W boson as well as the one originating from the top quark decay leptonically. Multivariate methods are used to extract the cross section. The result is compared with current standard model theory predictions. Furthermore, a search for s-channel single top production at 8 TeV is presented. The ratio of single-top t-channel events with a positive or negative lepton final state was measured. This measurement is made at a center-of-mass energy of 8 TeV. The measured ratio of top- to anti-top quark production is compared with predictions from different parton density distribution functions.
        Speaker: Mr. Mario Merola (INFN Sezione di Napoli (IT))
        Slides
    • 13:30 → 15:00
      Lunch 1h 30m
    • 15:00 → 17:30
      Accelerator Physics and Future Colliders: session 2 Sala 1 ()

      Sala 1

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Dr. Stephen Peggs (BNL)
      • 15:00
        J-PARC Accelerator Status 25m
        Japan Proton Accelerator Research Complex (J-PARC) has stated the beam extraction to the neutrino experiment (T2K) and the hadron experiments since 2009. However J-PARC had two big troubles during last three years: 1st one was induced by the Great East Japan Earthquake happened in March 2011 and the second one was caused by the radioactive material leak from hadron experimental hall in May 2013. Fortunately the damage to the accelerators from both troubles has been fixed and J-PARC has resumed the beam delivery to users. The achieved beam power for T2K is 240kW which is one third of design value of 750kW. In this report, the status of the high power operation is described. Furthermore it is also described for the issues to be fixed in order to achieve the design beam intensity.
        Speaker: Prof. Fujio Naito (KEK)
        Slides
      • 15:25
        Beamline for the LBNE Project 15m
        The LBNE beamline complex is designed to provide a neutrino beam of sufficient intensity and energy to meet the goals of the LBNE experiment with respect to long-baseline neutrino oscillation physics. Presented in this talk will be the issues related to the baseline design from the physics, beam power (>1 MW), lifetime, and radiological requirements. Potential future upgrades to the beamline to improve the neutrino flux spectrum and for higher beam power (>2 MW) will also be presented
        Speaker: Dr. Heidi Schellman (Northwestern University (United States))
        Slides
      • 15:40
        Muon Accelerators for High Energy Physics Applications: nuSTORM, NuMAX & Beyond... 25m
        Muon accelerators offer unique potential for high energy physics applications. They can provide clean, well-characterized and intense neutrino beams for short- and long baseline oscillation studies – thus providing unmatched measurement precision for key parameters such as the CP-violating phase as well as unique sensitivity to probe for new physics. Two Neutrino Factory concepts, nuSTORM and NuMAX, have recently been developed which can provide this unique physics reach at short- and long-baseline, respectively. This talk describes in detail the specifications and capabilities of these machines. In the further future, the implementation of these machines could also provide the foundation for deploying lepton collider capabilities in the multi-TeV regime.
        Speaker: Dr. Mark Palmer (Fermilab)
        Slides
      • 16:05
        The status of the construction of MICE Step IV 15m
        Muon beams of low emittance provide the basis for the intense, well-characterised neutrino beams necessary to elucidate the physics of flavour at the Neutrino Factory and to provide lepton-anti-lepton collisions at the Muon Collider at energies of up to several TeV. The International Muon Ionization Cooling Experiment (MICE) will demonstrate ionization cooling; the technique by which it is proposed to reduce the phase-space volume occupied by the muon beam at such facilities. Ionization cooling requires that a muon beam passes through a material (the absorber) in which it looses energy. In an ionization-cooling channel, the energy lost in the absorber is replaced in a short linac. The combined effect of energy loss and re-acceleration is to reduce the transverse emittance of the beam (transverse cooling). MICE is being constructed in a series of Steps. At Step~IV, MICE will be able to study the properties of liquid hydrogen and lithium hydride that affect cooling. A solenoidal spectrometer will measure emittance upstream and downstream of the absorber vessel. The muon beam will be focused at the absorber by a focusing coil. The construction of Step~IV at the Rutherford Appleton Laboratory is well advanced and is scheduled to be complete early in 2015. The status of the construction project will be described together with the performance of the principal components. The demonstration of ionization cooling will be performed at Step~V which requires an additional absorber/focus-coil module and a short linac (the RF/coupling-coil module). The status of preparation of the Step~V components will be briefly described.
        Speaker: Prof. Kenneth Long (Imperial College London)
        Slides
      • 16:20
        Development of the fast kicker for the muon g-2 experiment 15m
        We are developing the fast muon kicker for the muon g-2 experiment at Fermilab. The kicker is a pulsed magnet that provides the transverse kick to the muon particles required to direct them onto the stable (magic radius) orbit of the storage ring. To provide the right kick and maximize the storage efficiency of muons, the magnetic pulse generated from the kicker should have ,approximately, 250 Gauss peak value and 120 ns full width. Based on the experiences from the earlier g-2 experiment at BNL, we have redesigned the system using a triaxial blumlein pulse forming network and the prototype model has been built and tested. The details of the current status of kicker development will be presented at the conference.
        Speaker: Dr. SeungCheon Kim (Cornell University)
        Slides
      • 16:35
        High Precision Energy Calibration by Resonant Depolarization at VEPP-4M Collider 15m
        At the VEPP-4M collider the record accuracy of 10-6 of an absolute beam energy calibration was achieved with the resonant depolarization technique in the energy range including the J/psi, psi(2S), psi(3770) resonances as well as the tau-lepton production threshold. This report discusses the equipments, methods and results.
        Speaker: Dr. Sergei Nikitin (Budker Institute of Nuclear Physics)
        Slides
      • 16:50
        AWAKE : A proton-driven plasma wakefield acceleration experiment at CERN 15m
        The AWAKE Collaboration has been formed in order to demonstrate proton-driven plasma wakefield acceleration for the first time. This technology could lead to future colliders of high energy but of a much reduced length compared to proposed linear accelerators. The CERN SPS proton beam in the CNGS facility will be injected into a 10 m plasma cell where the long proton bunches will be modulated into significantly shorter micro-bunches. These micro-bunches will then initiate a strong wakefield in the plasma with peak fields above 1 GV/m that will be harnessed to accelerate a bunch of electrons from about 20 MeV to the GeV scale within a few meters. The experimental program is based on detailed numerical simulations of beam and plasma interactions. The main accelerator components, the experimental area and infrastructure required as well as the plasma cell and the diagnostic equipment are discussed in detail. First protons to the experiment are expected at the end of 2016 and this will be followed by an initial 3-4 year experimental program. The experiment will inform future larger-scale tests of proton-driven plasma wakefield acceleration and applications to high energy colliders.
        Speaker: Dr. Chiara Bracco (CERN)
        Slides
      • 17:05
        Neutron-Anti-Neutron Oscillations 25m
        Neutral particle oscillations have proven to be extremely valuable probes of fundamental physics. Kaon oscillations provided us with our first insight into CP-violation, fast Bs oscillations provided the first indication that the top quark is extremely heavy, B oscillations form the most fertile ground for the continued study of CP-violation, and neutrino oscillations suggest the existence of a new, important energy scale well below the GUT scale. Neutrons oscillating into antineutrons could offer a unique probe of baryon number violation. The construction of the European Spallation Source in Lund, with first beam expected in 2019, together with modern neutron optical techniques, offers an opportunity to conduct an experiment with at least three orders of magnitude improvement in sensitivity to the neutron oscillation probability. The physics case for such an experiment will be discussed, together with the main experimental challenges and possible solutions.
        Speaker: Dr. Camille Theroine (European Spallation Source)
        Slides
    • 15:00 → 17:33
      Astroparticle Physics and Cosmology Auditorium 3A ()

      Auditorium 3A

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Dr. Esteban Roulet (CONICET)
      • 15:00
        The Dark Energy Survey 24m
        The Dark Energy Survey (DES) is a next generation sky survey aimed directly at understanding the dark energy, by measuring the 14-billion-year history of cosmic expansion and the growth of structure in the universe with high precision. During fall 2012 the DES collaboration installed and commissioned DECam, a 570 mega-pixel optical and near-infrared camera with a large 3 sq. deg. field of view, set at the prime focus of the 4-meter Blanco telescope in CTIO, Chile, and took the first set of science images for Science Verfification. The first observing season then went from August 2013 to February 2014. Observing during five seasons, DECam will map an entire octant of the southern sky to unprecedented depth, measuring the position on the sky, redshift and shape of almost 300 million galaxies, together with thousands of galaxy clusters and supernovae. With this data set, DES will study the properties of dark energy using four main probes: galaxy clustering on large scales, weak gravitational lensing, galaxy-cluster abundance, and supernova distances. In this talk we present the current status of the project, and the plans and goals for the coming years.
        Speaker: Dr. Eusebio Sanchez (CIEMAT)
        Slides
      • 15:24
        Constraints on the dark matter interaction sector via extra radiation contributions 18m
        Despite the observational evidences in favor of Dark Matter its nature is still a mystery. Theoretical realizations assume that dark matter is stable and is the lightest state within the dark sector (e.g. WIMPs). The dark sector can also contains even lighter states like dark bosons and fermions. However, those can be completely disconnected from the visible sector except by interaction with the dark matter. We focus our attention on these very-light dark particles and their contribution to the radiation budget of the Universe as dark radiation. We provide constraints on how large the dark matter sector can be depending on the dark matter freeze-out temperature and on the number of dark particles.
        Speaker: Dr. Roberto Lineros (IFIC)
        Slides
      • 15:42
        The Dark Matter Self-Interaction and Its Impact on the Critical Mass for Dark Matter Evaporations Inside the Sun 18m
        It has been shown that the self-interaction between dark matter (DM) particles can increase the DM number density inside the Sun. The increasing rate of DM number density by this effect is proportional to the existing DM number density inside the Sun. We demonstrate that this effect can counteract DM evaporations in the regime of small DM mass. Consequently, the critical mass for DM evaporations (typically $3\sim 4$ GeV without the self-interaction) can be lowered down by DM self-interactions. Hence the DM annihilation rate for $m_{\chi}$ around few GeVs may be enhanced by self-interactions. This leads to the enhancement of neutrino flux from such annihilations. We discuss the prospect of observing such enhanced neutrino flux in IceCube-PINGU using the annihilation channels $\chi\chi\to \tau^+\tau^- , \, \nu\bar{\nu}$ as examples. The PINGU sensitivities to DM self-interaction cross section $\sigma_{\chi\chi}$ are estimated for track and cascade events.
        Speaker: Mr. Yen-Hsun Lin (IoP, Nat'l Chiao Tung University, Hsinchu, Taiwan)
        Slides
      • 16:00
        Precision predictions for supersymmetric dark matter 18m
        The dark matter relic density has been measured by PLANCK and its predecessors with an accuracy of about 2%. We present theoretical calculations with DM@NLO in NLO SUSY QCD and beyond, which allow to reach this precision for gaugino and squark (co-)annihilations, and use them to scan the phenomenological MSSM for viable regions, applying also low-energy, electroweak and hadron collider constraints.
        Speaker: Prof. Michael Klasen (Institute for Theoretical Physics, University of Münster)
        Paper
        Slides
      • 16:18
        Halo-Independent analysis of direct dark matter detection data for any WIMP interaction 18m
        The halo independent comparison of direct dark matter detection data eliminates the need to make any assumption on the uncertain local dark matter distribution and is complementary to the usual data comparison which required assuming a dark halo model for our galaxy. The method, initially proposed for WIMPs with spin-independent contact interactions, has been generalized to any other interaction and applied to recent data on ``Light WIMPs”.
        Speaker: Prof. Graciela Gelmini (University of California, Los Angeles (UCLA))
        Slides
      • 16:36
        Sommerfeld enhancements and relic abundance of neutralino dark matter in the general MSSM 18m
        We discuss the calculation of Sommerfeld enhancements on the neutralino LSP relic abundance calculation for heavy neutralino dark matter including co-annihilations of nearly mass-degenerate neutralino and chargino states. A newly developed EFT framework enables us to consider for the first time all (off)-diagonal potential and annihilation matrices including P- and next-to-next-to-leading order S-wave effects for a generic MSSM parameter space point, and to treat effects from heavy states perturbatively. To investigate the impact of the enhanced cross sections on the predicted neutralino relic abundance we identify interesting regions of parameter space. We discuss the different features of these regions, focusing in particular on heavy wino- and higgsino-like dark matter and models interpolating between the two scenarios.
        Speaker: Dr. Pedro Ruiz-Femenia (IFIC, Valencia)
        Slides
      • 16:54
        Nuclear Form Factors for Direct Dark Matter Detection 18m
        The goal of several ongoing and future direct detection experiments is to discover the dark matter present in our galactic halo in the form of Weakly Interacting Massive Particles (WIMPs). These experiments attempt to isolate from various backgrounds the signal of nuclear recoils from the elastic scattering of WIMPs with the target nuclei inside the detector. The expected signal (for a given flux) depends on the WIMP mass, the WIMP-nucleon cross section and the nuclear form factor. The nuclear form factor critically determines the spectrum of the recoil nuclei. Therefore its precise determination and error estimation is crucial to establish the bounds on the WIMP-nucleon cross section from running experiments and to plan future ones. While the distribution of protons in nuclei, which determines the corresponding form factor, can be extracted precisely and, to a large extent, model independently, our present knowledge of neutron distributions is far more uncertain. The latter are particularly important in scenarios where the cross sections on protons and neutrons are different [1]. We have performed a systematic global determination of nuclear form factors for nuclei ranging from 9Be to 209Bi using the available experimental information. We provide realistic (conservative) uncertainties for the parameters, estimating the systematic errors, and exploring possible correlations. In direct dark matter searches and related studies, it has been customary to describe the nuclear form factors using the Helm ansatz, which leads to an analytic expression for the form factor. On the other hand, the charge density distributions have been extracted from muon spectroscopy [2] using two-parameter Fermi (2PF) distributions. The widespread strategy to deal with this dichotomy [3] is to convert the 2PF parameters of Ref. [2] into Helm ones adopting an ad-hoc value for the nuclear thickness. We have improved this approach by fitting directly the measured nuclear radii and diffuseness [2,4]. Systematic errors related to the finite nucleon size, differences between electromagnetic and scalar form factors and the approximated compact expression adopted for the nuclear thickness are investigated. For the neutron distributions, we have used the experimental determination of the difference between neutron and proton radii using antiprotonic atoms [5]. The systematic errors have the same sources as in the proton case plus the one from the two extreme “halo” and “skin” distributions of neutrons in nuclei. The larger errors in neutron distributions should get smaller in the future thanks to parity-violating electron scattering experiments such as PREX, CREX and QWEAK. [1] J. L. Feng, Ann. Rev. Astron. Astrpphys. 48 (2010) 495. [2] G. Fricke et al., At. Data Nucl. Data Tables 60 (1995) 177. [3] J. D. Lewin and P.F. Smith, Astrop. Phys. 6 (1996) 87. [4] H. de Vries et al., At. Data Nucl. Data Tables 36 (1987) 495. [5] A. Trzcinska et al., Phys. Rev. Lett. 87 (2001) 082501.
        Speaker: Dr. Sonja Orrigo (IFIC Valencia)
        Slides
      • 17:12
        Dark Matter in scalar extensions of the Standard Model 18m
        Multi-scalar extensions of the Standard Model can accommodate a viable Dark Matter candidate and modifications of the Higgs decay rates, particularly into two photons. One of the simplest choices for the extended scalar sector is the Inert Doublet Model, i.e. the Standard Model with an additional inert scalar doublet. LHC measurements of the decay of the SM-like Higgs boson into two photons and PLANCK/WMAP results provide very strong constraints for the IDM. We discuss also further extensions of the scalar sector by additional singlets or doublets, which may modify the viable DM mass regions and allow for new phenomena not present in the IDM.
        Speaker: Dr. Dorota Sokolowska (University of Warsaw)
        Slides
    • 15:00 → 17:30
      Beyond the Standard Model Auditorium 2 ()

      Auditorium 2

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Filip Moortgat (CERN)
      • 15:00
        Hunting light SUSY: combined impact of LHC searches 15m
        We discuss a possible explanation of a slight excess in the WW cross section measurement performed by ATLAS and CMS. While still consistent with the Standard Model within 1-2 sigma, the excess could be also a first hint of physics beyond the Standard Model. We argue that this effect could be attributed to the production supersymmetric particles, eg. stops or charginos. The stops of mass ~200 GeV has the right cross section and under some assumptions can significantly contribute to the final state of two leptons and missing energy. Using CheckMATE and ATOM, the automated packages for comparing BSM models with experimental data, we scan this region of parameter space to find particle masses preferred by Standard Model measurements (WW and WZ production) and SUSY searches. We propose kinematic observables that could distinguish supersymmetric signal from the Standard Model contribution, as well as differentiate between various supersymmetric processes.
        Speaker: Dr. Krzysztof Rolbiecki (IFT Madrid)
        Slides
      • 15:15
        SUSY fits with full LHC Run I data 15m
        We present the latest results from the MasterCode collaboration on supersymmetric models, in particular on the CMSSM, the NUHM1, the NUHM2 and the pMSSM. We combine the data from LHC Run I with astro-physical observables, flavor and electroweak precision observables. We determine the best fit regions of these models and anlyze the discovery potential at LHC Run II.
        Speaker: Mr. Kees Jan de Vries (Imperial College London)
        Slides
      • 15:30
        The LHC confronts the pMSSM 15m
        We explore the impact of current (7+8 TeV) and future (14 TeV) LHC searches on the range of viable sparticle spectra within the 19/20 – dimensional pMSSM. Considering both neutralino and gravitino LSPs, we compare our results with simplified model exclusion limits and describe important cases where the pMSSM results differ significantly from the simplified model descriptions. We also consider models that are poorly constrained by LHC data because of unusual decay topologies and/or displaced decays, and discuss ways to improve the LHC sensitivity in these scenarios. Finally, motivated by naturalness, we examine the sensitivity of current searches to models with light stops and to a specialized set of models with fine-tuning better than 1%. We show that a surprising variety of searches are sensitive to light stops, and that the 14 TeV LHC will be a very powerful probe of natural pMSSM models.
        Speaker: Mr. Matthew Cahill-Rowley (SLAC National Accelerator Laboratory)
        Slides
      • 15:45
        Searches for supersymmetry in resonance production and R-parity violating prompt signatures with the ATLAS and CMS detector 20m
        In R-parity violating supersymmetric scenarios sparticles can be produced individually or in pairs with rates that are detectable at the LHC. This talk presents recent results from searches for resonant production and R-parity violating prompt signatures in multi-lepton and multi-jet final states in the data sample recorded by the ATLAS and CMS detectors.
        Speaker: Mr. Roger Caminal Armadans (Institut de Física d'Altes Energies (IFAE))
        Slides
      • 16:05
        Search for Beyond the Standard Model Physics in multi-leptonic and photonic final states with the CMS detector 15m
        In this talk, the latest results from CMS on searches for beyond the Standard Model physics in final states with 2, 3, 4 (or more) leptons and with photons are presented using 20/fb of data from the 8 TeV LHC run. A variety of complementary final state signatures and methods are used to probe new physics.
        Speaker: Dr. Pablo Martinez Ruiz Del Arbol (ETH Zürich, Switzerland)
        Slides
      • 16:20
        Searches for new Physics in events with multiple leptons with the ATLAS detector 15m
        Events containing several leptons are useful probes of new phenomena due to the low background from Standard Model processes. We look for anomalous production of prompt like-sign leptons or events with three or more leptons, as well as search for excited leptons, heavy leptons and heavy neutrinos. Searches for lepton-flavor violation are also presented. The searches use data recorded in 2012 at sqrt(s)=8 TeV centre-of-mass energy by the ATLAS experiment at the LHC.
        Speaker: Dr. Luca Fiorini (IFIC / U. Valencia)
        Slides
      • 16:35
        Search for Long-lived particles at CMS 15m
        The most recent searches for long-lived particles at CMS is presented. Searches for displaced jets, displaced leptons, displaced tops, heavy stable charged particles, and stopped particles are among those discussed. A variety of models are constrained by these searches, ranging from hidden valleys to split supersymmetry.
        Speaker: Mr. Paul Lujan (Princeton University)
        Slides
      • 16:50
        Searches for long-lived particles, lepton-jets, stable and meta-stable particles with the ATLAS detector 15m
        Several extensions of the Standard Model like supersymmetric scenarios predict the existence of massive long-lived particles, and some of these postulate the existence of a hidden sector of particles. We report on searches for production of long-lived particles resulting in displaced vertices, abnormal specific energy loss, appearing or disappearing tracks, or collimated lepton-jets. The talk presents results of analyses using data recorded in 2012 at sqrt(s)= 8 TeV centre-of-mass energy by the ATLAS experiment at the LHC.
        Speaker: Dr. Matthew King (IFIC)
        Slides
      • 17:05
        Searches for extra dimensions with the ATLAS and CMS detectors 20m
        Models with extra spatial dimensions have been proposed to explain the large apparent hierarchy between the Electroweak and Planck scales. Such models predict a host of different new phenomena. For example, classical and quantum black holes with spectacular signatures have been searched for with the full 8 TeV dataset. Extra spatial dimensions can also manifest themselves in a number of non-resonant phenomena. Latest results are reported.
        Speaker: Mr. Jan Kretzschmar (University of Liverpool)
        Slides
    • 15:00 → 17:30
      Computing and Data Handling Sala 2 ()

      Sala 2

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Conveners: Prof. Gang CHEN (Institute of High Energy Physics, CAS), Ian Fisk (FNAL)
      • 15:00
        The LHCb trigger system: performance and outlook 30m
        The LHCb experiment is a spectrometer dedicated to the study of heavy flavour at the LHC. The current LHCb trigger system consists of a hardware level, which reduces the LHC inelastic collision rate of 13MHz to 1 MHz, at which the entire detector is read out. In a second level, implemented in a farm of 20k parallel-processing CPUs, the event rate is reduced to about 5 kHz. We review the performance of the LHCb trigger system, focusing on the High Level Trigger, during Run I of the LHC. The High Level Trigger showcased a number of pioneering concepts, for example : the deployment of an inclusive multivariate B-hadron tagger as the main physics trigger of the experiment, buffering of events to local disks in order to leverage the otherwise idle resources when the LHC does not produce collisions, and simulation-free event-by-event trigger efficiency corrections. The LHCb experiment plans a major upgrade of the detector and DAQ system in the LHC shutdown of 2018. In this upgrade, a purely software based trigger system is being developed, which will have to process the full 30 MHz of inelastic collisions delivered by the LHC. We demonstrate that the planned architecture will be able to meet this challenge, particularly in the context of running stability and long term reproducibility of the trigger decisions. This talk will cover the design and performance of the LHCb trigger system in Run I as well as the planned improvements in the upgrade of the LHCb experiment.
        Speaker: Dr. Tim Head (CERN)
        Slides
      • 15:30
        Computing at Belle II 30m
        The existence of large matter-antimatter asymmetry (CP violation) in the b-quark system as predicted in the Kobayashi-Maskawa theory was established by the B-Factory experiments, Belle and BaBar. However, this cannot explain the magnitude of the matter-antimatter asymmetry of the universe we live in today. This indicates undiscovered new physics exists. The Belle II experiment, the next generation of the B-Factory, is expected to reveal the new physics by accumulating 50 times more data (~50ab-1) than Belle by 2022. The Belle II computing system has to handle an amount of beam data eventually corresponding to several tens of PetaByte par year under an operation of the SuperKEKB accelerator with a designed instantaneous luminosity. Under this situation, it cannot be expected that one site, KEK, will be able to provide all computing resources for the whole Belle II collaboration including the resources not only for the raw data processing but also for the MC production and physics analysis done by users. In order to solve this problem, Belle II employed the distributed computing system based on DIRAC, which provides us the interoperability of heterogeneous computing systems such as grids with different middleware, clouds and the local computing clusters. Since the last year, we performed the MC mass production campaign to confirm the feasibility and find out the possible bottleneck of our computing system. In parallel, we also started the data transfer challenge through the transpacific and transatlantic networks. This presentation describes the highlights of the Belle II computing and the current status. We will also present the experience of the latest MC production campaign in 2014.
        Speaker: Dr. Silvio Pardi (INFN)
        Slides
      • 16:00
        ATLAS Computing challenges before the next LHC run 30m
        ATLAS Computing challenges before the next LHC run On behalf of the ATLAS Collaboration ATLAS software and computing is in a period of intensive evolution. The current long shutdown presents an opportunity to assimilate lessons from the very successful Run 1 (2009-2013) and to prepare for the substantially increased computing requirements for Run 2 (from spring 2015). Run 2 will bring a near doubling of the energy and the data rate, high event pile-up levels, and higher event complexity from detector upgrades, meaning the number and complexity of events to be analyzed will increase dramatically. At the same time operational loads must be reduced through greater automation, a wider array of opportunistic resources must be supported, costly storage must be used with greater efficiency, a sophisticated new analysis model must be integrated, and concurrency features of new processors must be exploited. This presentation will survey the distributed computing aspects of the upgrade program and the plans for 2014 to exercise the new capabilities in a large scale Data Challenge.
        Speaker: Prof. Dario Barberis (Università e INFN Genova)
        Slides
      • 16:30
        CMS Computing Preparations for Run2 30m
        The CMS Computing system was successfully commissioned and operated in the first run of LHC. Beginning in 2015, CMS will collect, process, simulate and analyze 1kHz of higher complexity, higher energy events. In order to meet this increased computing challenge within the resource budget expected, we have had to evolve the computing model and the techniques used. In this presentation we will discuss the challenges expected in Run2 and the choices made to try to mitigate them. We will outline the improvements in the processing system and the goal to maximize flexibility in how processing resources are used. We will present how the primary reconstruction will be distributed between CERN and the global network of Tier-1 processing centers, and we will show the progress made in allowing resources to be shared across workflows. We will show the development and deployment status of the CMS data federation and how this is expected to reduce the growth of disk resources needed to facilitate analysis, and we will present the progress on a new analysis submission tool for CMS.
        Speaker: Dr. Maria Girone (CERN)
        Slides
      • 17:00
        Data processing and storage in the Daya Bay Reactor Antineutrino Experiment 30m
        The Daya Bay Reactor Antineutrino Experiment reported the first observation of the non-zero neutrino mixing angle θ13 using the first 55 days of data. It has also provided the most precise measurement of θ13 with the extended data to 217 days. Daya Bay will keep running for another 3 years or so. There is about 100TB raw data produced per year, as well as several copies of reconstruction data with similar data volume for each copy. The raw data is transferred to Daya Bay onsite and two offsite clusters: IHEP in Beijing and LBNL in California, with a short latency. There is quasi-real-time data processing at both onsite and offsite clusters, for the purpose of data quality monitoring, detector calibration and preliminary data analyses. The physics data production took place a couple of times per year according to the physics analysis plan. This talk will introduce the data transfer and storage, data processing and monitoring, and the automation of the calibration.
        Speaker: Dr. Miao He (Institute of High Energy Physics, Beijing)
        Slides
    • 15:00 → 17:30
      Detector RD and Performance Sala 6+7 ()

      Sala 6+7

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Dr. Felix Sefkow (DESY)
      • 15:00
        Status of the ATLAS calorimeters: their performance during three years of LHC operation and plans for future upgrades 20m
        The ATLAS experiment is designed to study the proton-proton collisions produced at the Large Hadron Collider (LHC) at CERN. Its calorimeter system measures the energy and direction of final state particles over the pseudorapidity range $|\eta| < 4.9$. Accurate identification and measurement of the characteristics of electromagnetic objects (electrons/photons) are performed by liquid argon (LAr)-lead sampling calorimeters in the region $|\eta| < 3.2$, using an innovative accordion geometry that provides a fast, uniform response without azimuthal gaps. This system played a critical role in the ATLAS analyses contributing to the Higgs boson discovery announced in 2012. The hadronic calorimeters measure the properties of hadrons, jets, and tau leptons, and also contribute to the measurement of the missing transverse energy and the identification of muons. A scintillator-steel sampling calorimeter (TileCal) is employed in the region $|\eta| < 1.7$, while the region $1.5 < |\eta| < 3.2$ is covered with a copper-LAr sampling calorimeter. The calorimetric coverage is extended to $|\eta| < 4.9$ by an integrated forward calorimeter (FCal) based on LAr with copper and tungsten absorbers and employing a novel electrode design. In the first three years of LHC running, approximately 27 fb$^{-1}$ of data have been collected at centre-of-mass energies of 7 and 8 TeV. Results on the calorimeter operation and performance over this period will be presented, including the calibration, stability, absolute energy scale, uniformity, and time resolution. These results demonstrate that the calorimeters are performing well within the design requirements and providing reliable input to physics analyses. Although LHC data-taking is expected to continue for a number of years, plans are already underway for operation at an instantaneous luminosity about 5 times the original design value of $10^{34}$ cm$^{-2}$s$^{-1}$. The calorimeter upgrade for this High Luminosity LHC (HL-LHC) involves two phases. In the first, upgrades to the LAr calorimeter electronics will provide more granular information to the trigger in order to reduce the effects of the high pile-up. The second phase will be devoted to the complete replacement of the front- and back-end electronics of both the TileCal and LAr calorimeters. In the case of the LAr calorimeter, additional complications may arise as a result of the increased instantaneous and integrated luminosities at the HL-LHC. These problems will be discussed along with a number of proposed solutions.
        Speaker: Prof. Stephanie Majewski (University of Oregon (United States))
        Slides
      • 15:20
        Role of the CMS electromagnetic calorimeter in the measurement of the Higgs boson properties and search for new physics 15m
        The precise determination of the mass, the width and the couplings of the particle discovered in 2012 around 125 GeV is of capital importance to clarify the nature of such a particle, in particular to establish precisely if it is a Standard Higgs boson. In several new physics scenarios, in fact, a Higgs boson may behave differently with respect to the Standard one, or may not be unique, i.e. there can be more than one Higgs boson. In order to achieve the precision needed to discriminate between different models, the energy resolution, the scale uncertainty and the position resolution for electrons and photons are required to be as good as possible. The CMS scintillating lead-tungstate electromagnetic calorimeter (ECAL) was built as a precise tool with an exceptional energy resolution and a very good position resolution that improved over the years with the knowledge of the detector. Moreover, thanks to the fact that most of the lead-tungstate scintillation light is emitted in about 20 ns, ECAL can be used to determine the time of flight of photons, hence giving precious information about the vertex position. In this talk we are going to show the current performance of the CMS ECAL and its evolution over time, with a special emphasis on the impact on the measurement of the properties of the Higgs boson and on searches for new physics.
        Speaker: Federico Ferri (CEA/Saclay Irfu/SPP)
        Slides
      • 15:35
        Performance of highly granular calorimeters in test beams 20m
        The CALICE collaboration has developed highly granular calorimeter prototypes to evaluate technologies for experiments at a future lepton collider optimized for particle flow event reconstruction. These technologies include electromagnetic calorimeters with tungsten absorbers and silicon or scintillator active elements, and hadronic calorimeters with steel and tungsten absorbers with scintillator and gaseous detector active elements, the former with analog and the latter with purely digital and with semidigital readout. We will discuss the design and the calibration of the different prototypes. Results on the performance, in particular the energy reconstruction and energy resolution, will be presented. The high granularity of the calorimeters enables reconstruction techniques such as software compensation to improve the energy resolution, which have already been successfully applied to some of the detector prototypes.
        Speaker: Dr. MaryCruz Fouz (CIEMAT)
        Slides
      • 15:55
        Comparison of test beam data from imaging calorimeters with GEANT4 simulations 20m
        The highly granular calorimeter prototypes of the CALICE collaboration have provided large data samples with precise three-dimensional information on hadronic showers with steel and tungsten absorbers and silicon, scintillator and gas detector readout. From these data sets, detailed measurements of the spatial structure, including longitudinal and lateral shower profiles and of the shower substructure are extracted. Dedicated experiments with scintillator and RPC active elements extend these measurements to include information on the time structure of hadronic showers. These results are confronted with GEANT4 simulations with different hadronic physics models, and present new challenges to the simulation codes and provide the possibility to validate and improve the simulation of hadronic interactions in high-energy physics detectors.
        Speaker: Dr. Eva Sicking (CERN)
        Slides
      • 16:15
        Design options for the upgrade of the CMS electromagnetic calorimeter 20m
        The CMS scintillating lead-tungstate calorimeter was designed to operate for at least ten years at the LHC, assuming an instantaneous luminosity of 2x10^34 cm^2/s. According to our measurements, the detector has performed according to design specifications and will survive with excellent performance through the lifetime of the LHC. However, plans for an upgrade of the LHC (the High Luminosity LHC, HL-LHC, project) aim at accumulating a much higher integrated luminosity, up to 3000/fb in ten years. This will expose the detector to a total irradiation of about six times higher with respect to the design specifications. An intense campaign of activities is then started to define the improvements needed to survive such an increase in irradiation levels. The activities carried out include both irradiation studies, simulations, design, realisation and test of prototypes of new detectors that may substitute at least part of the current one if needed, especially at large pseudorapidity. We will show the current options under study and the results obtained so far on the subjects outlined above.
        Speaker: Dr. Riccardo Paramatti (INFN - Rome)
        Slides
      • 16:35
        Phase I Upgrade of the CMS Hadron Calorimeter 15m
        In preparation for Run 2 (2015) and Run 3 of the LHC (2019), the CMS hadron calorimeter has begun a series of ambitious upgrades. These include new photodetectors in addition to improved front-end and back-end readout electronics. In the hadron forward calorimeter, the existing photomultiplier tubes are being replaced with thinner window, multi-anode readout models, while in the central region, the hybrid photodiodes will be replaced with silicon photomultipliers. The front-end electronics will include high precision timing readout, and the backend electronics will handle the increased data bandwidth. The barrel and endcap longitudinal segmentation will also be increased. This report will describe the motivation for the upgrade, its major components, and its current status.
        Speaker: Seth Cooper (University of Alabama)
        Slides
      • 16:50
        Totally Active Scintillator Calorimeter for the Muon Ionization Cooling Experiment 20m
        The Electron-Muon Ranger (EMR) is a totally active scintillator detector installed in the muon beam of the Muon Ionization Cooling Experiment (MICE) - the R&D project for the future neutrino factory. It is aimed at measuring properties of low energy beam composed of muons, electrons and pions performing the identification particle by particle. The EMR is made of 48 intersecting layers. Each layer consists of 59 triangular scintillator bars. The granularity of the detector (2880 readout channels) makes it possible to identify tracks and measure particle ranges and shower shapes. The read-out is based on FPGA custom made electronics and commercially available modules. It was built at University of Geneva and installed at the Rutherford Appleton Laboratory in Oxford in September 2013. Tests with low energy beam (100 - 400MeV/c) revealed an exceptional performance of the detector.
        Speaker: Mr. Ruslan Asfandiyarov (University of Geneva)
        Slides
      • 17:10
        The ATLAS Forward Proton (AFP) detector 15m
        The ATLAS Forward Proton (AFP) is a project to upgrade the ATLAS experiment with additional 3-D silicon detectors, placed at ±206 and ±214 meters on both sides of the ATLAS experiment, allowing measurements of the forward protons scattered diffractively or electromagnetically and with the remarkable capability to tag and measure both protons in exclusive central diffractive/elmg processes. The use of precision timing detectors allows this type of physics to be pursued to high luminosity for the first time. The AFP project opens up an important new window on LHC physics not available with the existing ATLAS detector. The AFP physics programme will be discussed, including soft diffraction, hard inclusive diffraction, exclusive diffraction and exotics studies in two-photon exchange processes. The experimental challenges in constructing this detector as well as the status of the project will be discussed
        Speaker: Mr. Sebastian Grinstein (ICREA/IFAE-Barcelona)
        Slides
    • 15:00 → 17:30
      Neutrino Physics: Three-Neutrino Oscillations, Part I Auditorium 3B ()

      Auditorium 3B

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Steve Brice (Fermilab)
      • 15:00
        Updated three-neutrino oscillation parameters from global fits 13m
        In this work we present an updated global fit to neutrino oscillation data within the three-flavour framework. The most recent data from solar and atmospheric neutrino experiments are included in our analysis together with the latest results from the long-baseline accelerator experiments T2K and MINOS and the recent measurements of reactor neutrino disappearance reported by Double Chooz, Daya Bay and RENO.
        Speaker: Dr. Mariam Tórtola (IFIC, Valencia)
        Slides
      • 15:15
        Latest results on nu_mu -> nu_tau oscillations from the OPERA experiment 13m
        The OPERA experiment is designed to prove neutrino oscillations in the nu_mu to nu_tau channel through the direct observation of the tau lepton in tau neutrino charged current interactions. The experiment has accumulated data for five years, from 2008 to 2012, with the CERN Neutrinos to Gran Sasso (CNGS), an almost pure nu_mu beam. In the last two years, a very large amount of the data accumulated in the nuclear emulsions has been analyzed. The latest results on oscillations with the increased statistics, which include a fourth tau neutrino candidate event, will be presented. Given the extremely low expected background, this result corresponds to the observation of the oscillation process with a four sigma level significance.
        Speaker: Dr. Masahiro Komatsu (Nagoya University, JAPAN)
        Slides
      • 15:30
        Precision measurement of muon neutrino disappearance by T2K 13m
        Please see attached file.
        Speaker: Alexander Himmel (Duke University)
        Slides
      • 15:45
        Initial probe of delta_CP by T2K with muon neutrino disappearance and electron neutrino appearance 13m
        Please see attached file
        Speaker: Mrs. Lorena Escudero (IFIC)
        Slides
      • 16:00
        Commissioning and Early Performance of the NOvA Detectors 13m
        NOvA, the NuMI Off-Axis electron Neutrino Appearance experiment is designed to carry out studies of numu->nue oscillation, char- acterized by the mixing angle theta-13. A complementary pair of detectors have been constructed roughly 14 mrad off the beam axis to optimize the purity of the electron neutrino signal at the far detector against neutral current backgrounds. The far detector is located 810 km from Fermilab, in Ash River, Minnesota. Both the 14 kton far detector and the near detector feature essentially fully active segmented liquid scintillator tracking volumes that provide fine grained event reconstruction. The first neutrinos to the Ash River site arrived in August 2014 while final construction and commissioning of the far detector was still underway. Final installation and initial commissioning of the near detector, located in the NuMI hall, took place in May 2014. Here, we describe the commissioning and early performance of the NOvA detectors, and preparations for first physics analyses.
        Speaker: Prof. Jim Musser (Indiana university)
        Slides
      • 16:15
        The need for an early anti neutrino run for NOvA 13m
        The moderately large value of theta13, measured recently by reactor experiments, is very welcome news for the future neutrino experiments. In particular, the NOvA experiment, with 3 years of neutrino run followed by an equal anti-neutrino run, will be able to determine the mass hierarchy if one of the following two favourable combinations is true: normal hierarchy with the CP phase in the lower half plane or inverted hierarchy with the CP phase in the upper half plane. In this report, we study the hierarchy reach of the first 3 years of NOvA data. Since sin**2(2*theta23) is measured to be non-maximal, theta23 can be either in the lower or higher octant. Pure neutrino data is affected by theta13-hierarchy and octant-hierarchy degeneracies, which limit the hierarchy sensitivity of such data. A combination of neutrino and anti-neutrino data is not subject to these degeneracies and hence has much better hierarchy discrimination capability. We find that, with a 3 year neutrino run, hierarchy determination is possible for only two of the four octant-hierarchy combinations. Equal 1.5 year runs in neutrino and anti-neutrino modes give good hierarchy sensitivity for all the four combinations.
        Speaker: Prof. Sankagiri Umasankar (Indian Institute of Technology Bombay)
        Slides
      • 16:30
        LBNE in the Precision Era of Neutrino Oscillation: Status and Schedule 13m
        LBNE (Long-Baseline Neutrino Experiment) is an accelerator-based neutrino oscillation experiment. LBNE will produce a muon-neutrino beam using protons from Fermilab's Main Injector and will detect electron-neutrino appearance and muon-neutrino disappearance using a Liquid Argon TPC located at a distance of 1300 km at Sanford Underground Research Facility in South Dakota. The primary physics motivation of LBNE is to determine the neutrino mass hierarchy, to determine the octant of the neutrino mixing angle theta_23, to search for CP violation in neutrino oscillation, and ultimately, to precisely measure the size of any CP-violating effect that is discovered. The status of LBNE and the physics potential of the LBNE research program will be described including the underground physics, in particular atmospheric neutrinos, proton decay, and supernova neutrinos, which are also primary physics goals of LBNE.
        Speaker: Dr. Zelimir Djurcic (Argonne National Laboratory)
        Slides
      • 16:45
        The LAGUNA/LBNO neutrino observatory in Europe 13m
        The LAGUNA and LAGUNA-LBNO consortia have performed two detailed design studies from 2008 to 2014 to define the optimal combination of baseline and detector technology for the next generation neutrino observatory. Starting from seven sites and three detector technologies we have prioritized our options and selected the Pyhäsalmi mine in Finland, 2300 km from CERN at 1400 m depth, using a liquid Argon double phase TPC as detector. The combination of the very long baseline and a detector deep underground allows a full neutrino astrophysics program, the test of BSM physics by measuring proton decay and long baseline neutrino physics. We will demonstrate the capability of LBNO to discover the mass hierarchy at the >5 sigma level within 4 years running using a 20 kt DLAr detector and an upgraded classical neutrino beam based on 400 GeV protons from the CERN SPS achieving 750 kW beam power. Knowing the mass hierarchy allows the determination of the CP violating phase ∂cp. This measurement uses the full figure of the oscillatory behaviour, the L/E dependence of the oscillation probability, predicted by the three neutrino-mixing paradigm. The very long baseline allows disentangling and demonstrating the matter effect from CP violating effects.
        Speaker: Vyacheslav Galymov (IPNL, CNRS/IN2P3)
        Slides
      • 17:00
        Hyper-Kamiokande: A next generation neutrino observatory to search for CP violation in the lepton sector 13m
        Hyper-Kamiokande (Hyper-K), a proposed one-megaton water cherenkov detector to be built in Japan, is the logical continuation of the highly successful program of neutrino (astro)physics and proton decay using the water Cherenkov technique. Hyper-K will search for CP violation in neutrino oscillations associated with the irreducible phase delta in the lepton mixing matrix using the neutrino beam produced at J-PARC. With an exposure of 7.5 MW x10^7 seconds, delta can be measured to better than 19 degrees at all values, and CP violation can be detected with more than 3 sigma significance for 76% of values of delta. In addition to the search for neutrino CP violation, Hyper-K will offer a broad program of neutrino astrophysics, including continued studies of atmospheric neutrinos and the detection of neutrinos produced in supernovae as far as the Andromeda Galaxy. It will also extend the sensitivity to proton decay, an incontrovertible sign of new physics and grand unification, by an order of magnitude.
        Speaker: Mr. hirohisa tanaka (UBC/IPP)
        Paper
        Slides
      • 17:15
        Intense Neutrino Super Beam Experiment for Leptonic CP Violation Discovery based on the European Spallation Source Linac 13m
        The European Spallation Source (ESS) linac with 5 MW proton power has the potential to become the proton driver of - in addition to the world’s most intense pulsed spallation neutron source - the world’s most intense neutrino beam. The physics performance of that neutrino Super Beam in conjunction with a megaton Water Cherenkov neutrino detector installed 1000 m down in a mine at a distance of about 500 km from ESS will be described. In particular, the superior potential of such a neutrino experiment placed at the 2nd oscillation maximum to discover the lepton CP violation in order to explain the matter-antimatter asymmetry in Universe and also the neutrino mass hierarchy will be presented. In addition, the choice of such detector will extent the physics program to proton-decay, atmospheric neutrinos and astrophysics searches. The ESS proton linac, the target station optimization and the physics potential will be described.
        Speaker: Dr. Marcos Dracos (IPHC/IN2P3 Strasbourg)
        Slides
    • 15:00 → 17:40
      Strong Interactions and Hadron Physics: Hadron production Sala 8+9 ()

      Sala 8+9

      Allocated time include time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Prof. Stefano Forte (Milan University)
      • 15:00
        Heavy flavour spectroscopy and production in the forward acceptance at the LHC 15m
        The latest years have seen a resurrection of interest in searches for predicted and exotic states motivated by tantalising observations by Belle and CDF. Using the data collected at pp collisions at 7 and 8 TeV by the LHCb experiment. We present a study of the properties of the Z(4430)+ resonance, with a first unambiguous determination of its quantum numbers. We also report on observations of excited states of the B, Bs and Λb hadrons and measurements of their masses and decay widths. Its forward acceptance puts the LHCb in a unique position at the LHC to measure QCD phenomena at large rapidities and low transverse momenta, where theoretical models often fail to describe the data accurately. We present studies of the production and polarisation of the J/ψ, ψ(2S) and χc charmonium states as well as those of ϒ and χb bottomonia.
        Speaker: Tomasz Skwarnicki (Syracuse University)
        Slides
      • 15:15
        Hadroproduction of $\Upsilon(nS)$ above the $B\bar{B}$ threshold and implications for $Y_b(10890)$ 15m
        Based on the non-relativistic QCD factorization scheme, we study the hadroproduction of the bottomonium states Υ(5S) and Υ(6S). We argue to search for them in the final states Υ(1S,2S,3S)π+π−, which are found to have anomalously large production rates at Υ(5S). The enhanced rates for the dipionic transitions in the Υ(5S)-energy region could, besides Υ(5S), be ascribed to Yb(10890), a state reported by the Belle collaboration, which may be interpreted as a tetraquark. The LHC/Tevatron measurements are capable of making a case in favor of or against the existence of Yb(10890), as demonstrated here. Dalitz analysis of the Υ(1S,2S,3S)π+π− states from the Υ(5S)/Yb(10890) decays also impacts directly on the interpretation of the charged bottomonium-like states, Zb(10600) and Zb(10650), discovered by Belle in these puzzling decays.
        Speaker: Prof. Ahmed Ali (DESY)
        Slides
      • 15:30
        Quarkonium (-like) states at BELLE 15m
        Studies of quarkonium and quarkonium-like states have led to several surprises in understanding the strong interaction phenomena. Most notably, exotic resonances that cannot be accommodated with the conventional quarkonium pictures including $X(3872)$, $Z_c(4430)^\pm$, $Z_b(10610)^\pm$ and $Z_b(10650)^\pm$ have been discovered by Belle. In this presentation, we report recent results from Belle on quarkonium and quarkonium-like states at Belle, in B-meson decays, $\Upsilon(nS)$ decays and in ISR processes. For charmonium(-like) states in B decays, we present new decay modes of X(3872) and X(3823), a new charged state $Z_c(4210^+ \to J/\psi \pi^+$, and searches for neutral and charged isospin partners of $D_{s0}(2317)^+$. In the ISR processes, we present a search for $Z_{cs}$, a partner state of $Z_c(3900)$, in $e^+ e^- \to K^+ K^- J/\psi$, improved measurements of $Y(4360)$ and $Y(4660)$ parameters, and search for new resonances in $e^+ e^- \to \gamma \chi_{cJ}$. For bottomonium(-like) states, we present final results of the 6-dimensional amplitude analysis of the $\Upsilon(5S) \to \Upsilon(1S,2S,3S) \pi^+ \pi^-$ decays which determines the spin-parities of $Z_b(10610)$ and $Z_b(10650)$; energy scan of $\sigma[e^+ e^- \to {\rm hadrons}]$ and $\sigma[e^+ e^- \to \Upsilon(1S,2S,3S) \pi^+ \pi^-]$ in the region of the $\Upsilon(5S)$ and $\Upsilon(6S)$ resonances; observation of $\Upsilon(4S) \to h_b(1P) \eta$ transitions using the $h_b(1P) \to \eta_b(1S) \gamma$ decays; and the first observation of several new hadronic and radiative transitions, that shed light on the nature of highly excited states. We also present double charmonium production in exclusive bottomonium decays with an evidence for $\Upsilon(1S) \to J/\psi chi_{c1}$.
        Speaker: Dr. Pavel Krokovny (Budker Institute of Nuclear Physics and Novosibirsk State University)
        Slides
      • 15:45
        Quarkonium (-like) states at BABAR 15m
        The B factories provide a unique playground for studying the properties of conventional and exotic quarkonium states which are produced through various mechanism. We report on a variety of recent results obtained using the full data set collected with the BABAR detector at the PEPII e+e- collider. In particular, we present measurements of the prompt production of J/psi or psi(2S) in association with a second charmonium state at a center-of-mass energy of 10.58 GeV, searches for exotic neutral and charged charmonium-like states, studies of charmonium production in two-photon fusion and initial state radiation processes, as well as studies of radiative transitions between bottomonium states.
        Speaker: Mrs. Elisa Fioravanti (INFN Ferrara)
        Slides
      • 16:00
        Production of light mesons at BABAR 15m
        The clean environment of e+e- annihilation at the center-of-mass energy of about 10 GeV allows precise studies of several aspects of hadron production both in exclusive and inclusive processes. Precise measurement of exclusive e+e- -> hadrons cross sections are needed to improve the theory prediction of the muon anomalous magnetic moment, and for shedding light on the current ~3.5 sigma difference between the predicted and the experimental values. BABAR has an intensive program of studying hadronic cross sections in low-energy e+e- collisions, which are accessible with data taken near the Upsilon(4S) via initial-state radiation, and it has previously published results on a number of processes with two to six hadrons in the final state. Here, we report the results of cross section measurements in the energy region between the production threshold and about 4.5 GeV for the pi+pi-pi0pi0, the K+K- and K0S K0L final states, and the first measurements for several other final states with two neutral kaons, obtained by BABAR. Fragmentation functions, which describe the formation of final state particles from a partonic initial state and are directly related to the QCD phenomenon of confinement, can be effectively studied at a B factory via inclusive e+e- -> hadrons processes. Precise knowledge of these functions is a key ingredient in accessing quantities such as the nucleon spin structure in semi-inclusive deep inelastic scattering and proton-proton collisions. Such mechanism entails a correlation between the transverse polarization of the fragmenting quark and the outgoing direction of the produced hadron. We report on measurements, performed by the Belle and BABAR collaborations, of the azimuthal asymmetries induced by the Collins effect in inclusive production of hadron pairs, in the e+ e- -> h1 h2 X annihilation process, where h1 and h2 are pions or kaons produced in opposite hemispheres.
        Speaker: Dr. Vladimir Druzhinin (Novosibirsk State University / BINP)
        Slides
      • 16:15
        Study of baryon productions at Belle and BABAR 15m
        Production of baryons in B decays, in $\Upsilon(nS)$ decays and in $e^+ e^- \to q\bar{q}$ continuum processes can play a key role to improve our understanding of strong interaction and hadron dynamics. Moreover, inclusive anti-deutron production rate from hadronization process can shed light in searching for dark matter annihilation in cosmic ray anti-deuterons. In this presentation, we report on recent results on baryon production and decays from the $e^+ e^-$ B-factory experiments, Belle and BABAR. In particular, we present new results in charmed and charmless baryonic decays of B mesons, inclusive anti-deuteron and hyperon productions in $\Upsilon(nS)$, $\chi_{bJ}$ and continuum processes, new spectroscopic results - mass, width, absolute branching fraction - in charmed baryon states, and double baryon production in bottomonium annihilations. We also present new results on $\eta_c \to \bar{p} \Lambda K^+ + (c.c.)$.
        Speaker: Dr. Min-Zu Wang (Taiwan National University)
        Slides
      • 16:30
        Hadron Spectroscopy at BESIII 15m
        Based on the world’s largest samples of J/psi, psi(3686) decays, as well as the data taken around the peak of Y(4260) resonance collected at the BESIII detector, the progresses on the hadron spectroscopy are presented, including the PWA of J/psi radiative decays, eta and eta’ physics, and observations of charmonium-like Zc states.
        Speaker: Mr. Shuangshi Fang (Inistitute of High Energy Physics, CAS, China)
        Slides
      • 16:45
        Recent results on e+e- ->hadrons cross sections from SND and CMD-3 detectors at VEPP-2000 collider 15m
        The recent results on e+e- ->hadrons cross section obtained with the SND and CMD3 detectors at the VEPP-2000 collider in the energy range up to 2 GeV are presented. The following processes were studied: e+e- ->pi+pi-, K+K-, pi+pi-pi0, pi+pi-pi0pi0, eta pi+pi-, omega eta, eta gamma, etc. The results on measured cross sections are important from the point of view of their contribution to the total hadron cross section, the muon g-2 and the parameters of excited vector mesons. The nucleon anti-nucleon production at the threshold was also studied.
        Speaker: Dr. Tatyana Dimova (BINP/NSU Novosibirsk Russia)
        Poster
        Slides
      • 17:00
        Heavy flavour production at ATLAS and CMS 15m
        Studies of heavy flavour production are very important to improve our understanding of QCD and hadron formation, given that the heavy quark masses allow the application of theoretical tools less sensitive to nonperturbative effects. This talk presents ATLAS and CMS heavy flavour results obtained in pp collisions, at 7 and 8 TeV, placing emphasis on the most recent measurements. In particular, we will present a series of systematic measurements in quarkonium production physics, including double-differential cross sections and polarizations, for five S-wave quarkonia: J/psi, psi(2S), Y(1S), Y(2S), and Y(3S). Some of these measurements extend well above pT~50 GeV, probing regions of very high pT/mass, where the theory calculations are the most reliable. Recent results on P-wave quarkonia will also be shown, as well as measurements in the field of B-hadron and exotic quarkonium spectroscopy.
        Speaker: Dr. Hermine K Woehri (CERN)
        Slides
      • 17:15
        Double Parton Studies at D0: Measurements of the prompt single J/psi and double J/psi production cross section and studies of photon + 3 jets events and photon +b/c+2 jet events 15m
        We present measurements of the production cross section of prompt J/psi mesons, as well as the cross section of simultaneous production of two prompt J/\psi mesons, in proton-antiproton collisions at sqrt(s)=1.96 TeV using 8.1 fb-1 of Tevatron data collected by the D0 experiment. The latter cross section is separated into contributions due to single parton and double parton (DP) scatterings. Using these measurements, the effective cross section, a parameter characterizing an effective spatial area of parton-parton interaction and tightly related to the parton spatial density inside the nucleon, is also measured. We have also used a sample of photon + 3 jets as well as photon + b/c + 2 jet events collected by the D0 experiment with an integrated luminosity of 8.7 fb-1 to determine the fraction of events with hard DP scattering in a single proton-antiproton collision. The DP fraction and effective cross section are measured in three different kinematic regions.
        Speaker: Dr. Don Lincoln (Fermilab)
        Slides
    • 15:00 → 15:35
      Top-quark and ElectroWeak Physics: Single top production Sala 3+4 ()

      Sala 3+4

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Conveners: Prof. Jessie Shelton (University of Illinois, Urbana-Champaign), Dr. Maria Jose Costa (IFIC)
      • 15:00
        Single Top quark production cross section using the ATLAS detector at the LHC 20m
        Measurements of single top-quark production cross section in proton proton collisions at 7 and 8 TeV are presented. In the leading order process, a W boson is exchanged in the t-channel. For this process for the first time a fiducial cross section measured within the detector acceptance is presented and the modelling uncertainty when extrapolating to the total inclusive cross section is assessed with a large number of different Monte Carlo generators. The result is in good agreement with the most up-to-date theory predictions. Furthermore, the single top-quark and anti-top total production cross sections, their ratio, as well as a measurement of the inclusive production cross section is presented. Differential cross sections are measured as a function of the transverse momentum and the absolute value of the rapidity of top and anti-top quarks. In addition, a measurement of the production cross section of a single top quark in association with a W boson is presented. The s-channel production is explored and limits on exotic production in single top quark processes are discussed. This includes the search for flavor changing neutral currents and the search for additional W bosons (W’).
        Speaker: Dr. Dominic Hirschbuehl (University Wuppertal)
        Slides
      • 15:20
        Measurement of top quark properties in single top production at CMS 15m
        Single top topologies are exploited for studies of top quark properties. This includes the first measurement of single top polarization in the t-channel production mode in pp collisions, which directly confirms the V-A nature of the tWb production vertex. W-helicity fractions are measured in the phase space sampled by a selection optimized for t-channel single top production, orthogonal to the ttbar final states used in traditional measurements of these properties. Anomalous couplings of the top quark are searched in t-channel single top production with a NN-based analysis.
        Speaker: Dr. Efe Yazgan (Ghent University)
        Slides
    • 15:35 → 17:30
      Top-quark and ElectroWeak Physics: Top properties Sala 3+4

      Sala 3+4

      Valencia, Spain

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Conveners: Prof. Jessie Shelton (University of Illinois, Urbana-Champaign), Dr. Maria Jose Costa (IFIC)
      • 15:35
        Top quark pair production and top quark properties at CDF 20m
        Result of merging two abstracts: We present the most recent CDF top quark pairs production cross sections measurements. We also present the test of Standard Model predictions for top quark decaying into b quarks, performed by measuring the ratio R between the top quark branching fraction to b quark and the branching fraction to any type of down quark. The extraction of the CKM matrix element |V_tb| from the ratio R is discussed. Finally, the direct measurement of top quark width and the W helicity fractions from top decays are shown. We present the latest measurements on the forward-backward asymmetry (AFB) in top anti-top quark production in proton-antiproton collisions with center-of-mass energy of 1.96 TeV using CDF II detector at the Tevatron. With the full CDF Run II data set, the measurements are performed in top anti-top decaying to final states that contain one or two charged leptons (electrons or muons). In addition, we combine the results of the leptonic forward-backward asymmetry between the two final states. All the results show deviations from the next-to-leading order (NLO) standard model (SM) calculation.
        Speaker: Dr. Chang-Seong Moon (CNRS-Paris and INFN-Pisa)
        Slides
      • 15:55
        Top quark pair production and top quark properties at D0 20m
        Result of merged abstracts: We present the most recent measurement of the top quark pair cross section with the D0 detector at the Tevatron proton-antiproton collider in the lepton plus jets and dilepton channels using the full D0 Run II data corresponding to an integrated luminosity of 9.7/fb. We use the measured inclusive cross section to extract the top quark mass via the tt(bar) cross section dependence from the top quark mass. We also present the measurements of differential distributions of top quarks in the lepton plus jets channel using again the full D0 Run II data. The measured spectra, binned in several observables, are corrected to parton level and compared to the spectra obtained from the Monte Carlo simulation and QCD at approximate NNLO. We present the measurement of the forward-backward asymmetry in top antitop quark pair production in proton antiproton collisions in the lepton plus jets and dilepton final states. Measurements use the full data set collected by D0 in Run II corresponding to an integrated luminosity of 9.7/fb. We present the most recent measurements of the lepton-based asymmetries in both lepton+jets and dilepton final states and their combination. We also present the measurement of the top quark based asymmetry inclusively as well as differentially in m(ttbar). These results are corrected for efficiency, acceptance and resolution effects to the parton level. Measurements are compared to theory predictions. We present results of top quark property studies with the D0 detector in pp(bar) collisions at a center-of-mass energy of 1.96 TeV at the Tevatron collider. In particular we discuss the measurement of spin correlations using the matrix element technique. The full D0 data set corresponding to an integrated luminosity of 9.7 fb^-1 is analyzed. We also discuss the new D0 measurement of the fraction of ttbar events produced via the gg fusion process and an updated measurement of the top quark charge.
        Speaker: Prof. Regina Demina (Rochester)
        Slides
      • 16:15
        Measurement of top quark properties using the ATLAS detector at the LHC 20m
        Result of merged abstracts: In proton-proton collisions at the LHC, pairs of top and anti-top quarks are expected to be mostly produced through gluon fusion. Making use of the large number of top quark pairs collected in the 7 TeV data, we present measurements of the spin correlation between top and anti-top quarks using several variables and discuss their sensitivity to new physics. In addition, we present measurements of the top quark polarisation predicted in models with CP-conserving and CP-violating processes. A top pair-enriched sample of events with a single lepton (electron or muon), missing transverse momentum and at least four high transverse momentum jets, of which at least one is tagged as coming from a b-quark, is used to measure tt production charge asymmetry to Ac=0.006 +/- 0.010. Differential Ac measurements as a function of the invariant mass, the rapidity and the transverse momentum of the tt-system are also presented. In addition, Ac is measured for a subset of events with large tt velocity, where physics beyond the Standard Model could contribute. All measurements are consistent with the Standard Model predictions. Properties of the top quark are measured in proton-proton collisions data at 7 and 8 TeV. The charge of the top quark of the top quark is found in agreement with the Standard Model prediction. In addition, the polarization of W bosons is measured. Together with other measurements this probe the structure of the Wtb-vertex are measured and constraints on anomalous couplings derived. A search for flavour changing neutral current processes in top quark decays is also presented.
        Speaker: Dr. Simon Head (University of Birmingham)
        Slides
      • 16:35
        Measurements of top quark properties in top pair production and decay at the LHC using the CMS detector 20m
        Result of merged abstracts: Measurements are presented of the properties of top quarks in pair production from proton-proton collisions at the LHC. The data were collected at pp centre-of-mass energies of 7 and 8 TeV by the CMS experiment during the years 2011 and 2012. The charge asymmetry is measured using the difference of the absolute rapidities of the reconstructed top and anti-top kinematics, as well as from distributions of the top quark decay products. The measurements are performed in the decay channels of the ttbar pair into both one and two leptons in the final state. The results, obtained differentially in several kinematic variables of the ttbar-system, are discussed in the context of the forward-backward asymmetry measurements at Tevatron. The polarization of top quarks is measured from the decay angular distributions. Top quark spin correlations and asymmetries are measured from the angular distributions of the top quark decay products. Measurements of the associate production of top quark pairs with vector bosons (photons, W and Z) are also presented. The results are compared with standard model predictions. Several measurements of top quark properties in top quark decays are presented using data collected by the CMS experiment during the years 2011 and 2012. The polarization of W bosons in top quark decays is measured. The W-boson helicity fractions and angular asymmetries are extracted and limits on anomalous contributions to the Wtb vertex are determined. The flavor contents in top-quark pair events are measured using the fraction of top quarks decaying into a W-boson and a b-quark relative to all top quark decays, R=BR(t->Wb)/Sum(BR(t->Wq)), and the result is used to determine the CKM matrix element Vtb as well as the width of the top quark resonance. The top-quark charge is measured, using the charge correlations between high-pT muons from W boson decays and soft muons from B-hadron decays in b jets.
        Speaker: Dr. Sergo Jindariani (Fermi National Accelerator Lab., United States)
        Slides
      • 16:55
        Constraining top-Z couplings through ttb+Z production at the LHC 15m
        The LHC has observed top-pair production in association with electroweak gauge bosons in the 7 TeV dataset, with many more events expected at the higher energy and luminosity run. This allows the EW interactions of the top, previously only constrained indirectly, to be investigated directly. I will present a calculation of ttbar+Z production to NLO in QCD, including decays of the top and Z boson in the narrow-width approximation, and retaining all spin correlations. Using this calculation, I will put constraints on the top-Z coupling from the measured CMS 7 TeV cross-section. Using the opening angle of the leptons arising from the Z decay, I will consider future constraints from the 13 TeV LHC run. In both cases, the lower scale uncertainty and reasonably large k-factor associated with the NLO predictions allows greater sensitivity to the top-Z couplings.
        Speaker: Dr. Raoul Rontsch (Fermilab)
        Slides
      • 17:10
        Search for Top Quark Flavor-Changing Neutral Currents at CMS 15m
        We present searches for the top quark flavor-changing neutral current (FCNC) interactions by the CMS experiment. The FCNC searches have been performed in the vertices of tqZ, tqg, tqH and tqA in decay and production processes. The results are based on the data collected from proton proton collisions at the LHC at a centre-of-mass energies of 7 and 8 TeV.
        Speaker: Dr. Mojtaba Mohammadi Najafabadi (IPM)
        Paper
        Slides
    • 17:30 → 18:00
      Coffee 30m
    • 20:00 → 22:00
      Concert and reception cocktail Auditorium 1 ()

      Auditorium 1
  • Friday, 4 July
    • 09:00 → 11:05
      Accelerator Physics and Future Colliders: session 3 Sala 1 ()

      Sala 1

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Dr. Frank Zimmermann (CERN)
      • 09:00
        Status of SuperKEKB construction 25m
        SuperKEKB is a major upgrade of the asymmetric B-factory collider, KEKB, to provide a 40 times higher luminosity than that achieved at KEKB. The design of SuperKEKB adopted the nano-beam scheme for the collision of two beams which was originally proposed for Italian Super B Factory. This scheme uses a nano-scale beam size (the vertical size is 50 nm and horizontal size is ~ 0.01 mm) and a large crossing angle at the interaction point. The nano-scale beam size is realized with a low emittance optics and very small beta function at the collision point. For the low emittance design, a substantial part of the positron ring (LER) was reconstructed. All dipole magnets of LER were replaced with longer ones. The beam pipes of LER were renewed to mitigate the electron cloud problem. Around the interaction point, about 300 m region of both rings was completely redesigned for the new collision scheme. In various aspects, the nano-beam scheme SuperKEKB is a challenging accelerator. The final focusing superconducting magnets are unprecedentedly compact. The tolerances for the hardware to realize a nano-scale beam size and to keep the collision are very tight. And optics design is still looking for a wider dynamic aperture. The present status of these challenging upgrades and a commissioning strategy will be reported.
        Speaker: Ken-ichi Kanazawa (High Energy Accelerator Reseach Organization)
        Slides
      • 09:25
        An Introduction to CEPC/SppC Accelerator Design Status 25m
        In this paper the status of CEPC/SppC will be reviewed covering project goals, accelerator design study status, time line, key design drivers, and accelerator physics challenges, et cetera.
        Speaker: Prof. Jie Gao (Institute of High Energy Physcis)
        Slides
      • 09:50
        FCC study: parameters and optics for hadron and lepton colliders 25m
        A new international study has just been launched to design a hadron collider with a centre-of-mass energy of the order of 100 TeV in a new 80-100 km tunnel as a long-term goal. The design study includes a 90-350 GeV lepton collider, seen as a potential intermediate step, and an ep option. This paper reports on the overall parameters and preliminary optics designs with special emphasis on the Interaction Regions and the constraints arising for having to host both the lepton and the hadron colliders. Preliminary hardware specifications, as magnetic field, gradient, lengths and aperture are also presented.
        Speaker: Dr. Rogelio Tomas Garcia (CERN)
        Slides
      • 10:15
        FCC study: ep/eA collisions in the 'he' mode 10m
        The Future Circular Collider (FCC) is a proposed facility at CERN to provide 50 TeV protons and 19.7 TeV/nucleon Pb nuclei, and up to 175 GeV electrons and positrons, in a new 80-100 km tunnel. Recently CERN has launched a study which includes the three principal modes of operation: hadron-hadron, electron-electron and hadron-electron (he) collisions. For the 'he' mode, two options exist for combining the new, FCC hadron accelerator with an electron beam: a) from the LHeC ERL installation or b) from the new electron storage ring of the FCC. The talk presents a first view on the resulting accelerator parameters, the detector concept and the physics case.
        Speaker: Max Klein (University of Liverpool)
        Slides
      • 10:25
        Crab cavities for colliders - past, present and future 15m
        The numerous parasitic encounters in the LHC are mitigated by introducing a crossing angle between beams. Crab cavities would allow restoring head-on collisions at the interactions point, thus increasing the geometric luminosity. Crab cavities would also offer a mechanism for luminosity leveling. KEKB was the first facility to implement the crab crossing technique in 2007, for the interaction of electron and positron beams. The High Luminosity Large Hadron Collider (HL-LHC) project envisages the use of crab cavities for increasing and leveling the luminosity of proton-proton collisions in LHC. And crab cavities have been proposed and studied for future colliders like CLIC, ILC and eRHIC. We will review in this paper the past, present and future of crab cavities for particle colliders.
        Speaker: Dr. Silvia Verdú-Andrés (Brookhaven National Laboratory (BNL))
        Slides
      • 10:40
        High Power Targets for Accelerator Based Research Facilities 25m
        Target designs used in accelerator facilities that serve to produce useful particles for physics or materials research are being pushed to accept increasing levels of beam power to enable new regimes of study. The field of high power targets spans a range of applications, including neutron sources, neutrino factories, radioactive ion beams sources, isotope production and materials irradiation test facilities. They operate with continuous or pulsed beams. “High power” broadly refers to high volume power density or volume energy density per pulse, or simply high time-averaged power. In addition to achieving efficient production of the desired particles, common challenges to the engineers in the high power target community include meeting facility requirements for duty cycle and target lifetime, removal of deposited beam heating, management of thermal stress and thermal shock effects, dealing with radiation damage effects on target thermo-physical properties, and satisfying safety and waste regulations. These demands have led to some novel target designs and concepts such as liquid metals, rotating solids, flowing metal powder or granular targets. A review of high-powered targets – operating and in development – will be presented. The High Power Targetry Workshop takes place at Fermilab this May with participants from the full spectrum of applications; highlights from that workshop will also be covered.
        Speaker: Mr. Bernard Riemer (Oak Ridge National Laboratory)
        Slides
    • 09:00 → 11:00
      Astroparticle Physics and Cosmology Auditorium 3A ()

      Auditorium 3A

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Prof. Graciela Gelmini (University of California, Los Angeles (UCLA))
      • 09:00
        Results of the LUX Dark Matter Experiment 19m
        LUX (Large Underground Xenon) is a dark matter direct detection experiment deployed at the 4850' level of the Sanford Underground Research Facility (SURF) in Lead, SD, operating a 370 kg dual-phase xenon TPC. We have recently published the results of the first WIMP search run, presenting the analysis of 85.3 live-days with a fiducial volume of 118 kg, taken during the period of April to August 2013. The experiment exhibited a sensitivity to spin-independent WIMP-nucleon elastic scattering with a minimum upper limit on the cross section of 7.6 x 10^-46 cm^2 at a WIMP mass of 33 GeV/c^2, becoming the world’s leading WIMP search result, in conflict with several previous claimed hints of discovery. In this talk I will provide an overview of the experiment, focusing in the recent science results, and an update on the next steps in the LUX program.
        Speaker: Carmen Carmona (UC Santa Barbara)
        Slides
      • 09:38
        CDMSlite: a New Way to Search for Low-Mass WIMPS with Cyogenic Detectors 19m
        Dark Matter (DM) is thought to make up ∼ 84.5% of the matter content of the universe. It is a key ingredient of the standard model of cosmology (ΛCDM) and could provide a window to new theories beyond the standard model of particle physics. There has been much recent interest in low-mass (O(5 GeV)) Weakly Interacting Massive Particles, as predicted by certain supersymmetric models and other theories, and motivated by various hints from direct detection experiments. The Super Cryogenic Dark Matter Search (SuperCDMS) experiment is currently operating 15 upgraded germanium detectors at the Soudan Underground Laboratory in Minnesota, USA. Theses detectors were used to set competitive constraints in the search for low-mass WIMPs. I will present the results and prospects of a very low-threshold operational mode called CDMSlite (CDMS low ionization threshold experiment). For this innovative experiment, we operated a single detector with a higher voltage than usual. This allows for voltage assisted calorimetric amplification, resulting in the lowest ionization threshold obtained with a germanium dark-matter detector. The 170 eVee threshold allowed the exploration of new WIMP parameter space below 6 GeV. A longer run in this mode started in February 2014 and will continue for several months.
        Speaker: Mr. Yohan Ricci (Queen's University)
        Slides
      • 09:57
        The XENON Dark Matter Project: from XENON100 to XENON1T 19m
        The XENON Collaboration aims at Dark Matter direct detection searching for interactions in a liquid xenon target. The XENON100 detector, a dual phase xenon Time Projection Chamber employing 161 kg of liquid xenon, started the first science run at the Laboratori Nazionali del Gran Sasso in Italy in 2009. It provided as scientific output limits on the spin-independent and spin-dependent interaction cross sections of Weakly Interacting Massive Particles (WIMPs), and the couplings of solar axions and galactic axion-like particles. We present the most recent results and we report the plan for the 2014 data taking. This run mainly focuses on additional calibration for the low energy response of the detector and the validation of new calibration techniques in view of the successor experiment, XENON1T. The new detector, currently under construction and starting data taking in 2015, will employ a liquid xenon target larger than 1 ton, reaching a sensitivity to spin-independent WIMP-nucleon cross section of the order of 10^-47 cm^2.
        Speaker: Dr. Matteo Alfonsi (Nikhef)
        Slides
      • 10:16
        Recent results from DAMA/LIBRA-phase1 and perspetives 19m
        The DAMA/LIBRA set-up (about 250 kg highly radiopure NaI(Tl)) is running at the Gran Sasso National Laboratory of the I.N.F.N.. This experiment is mainly dedicated to the investigation of Dark Matter (DM) particles in the galactic halo by exploiting the model independent DM annual modulation signature. In its first phase DAMA/LIBRA has collected data over 7 annual cycles corresponding to an exposure of 1.04 ton $\times$ yr (DAMA/LIBRA--phase1). The DAMA/LIBRA--phase1 and the former DAMA/NaI data (cumulative exposure $1.33$ ton $\times$ yr, corresponding to 14 annual cycles) give evidence at 9.3 $\sigma$ C.L. for the presence of DM particles in the galactic halo on the basis of the exploited model independent signature by using highly radio-pure NaI(Tl) target. No systematic or side reaction able to mimic the exploited DM signature has been found or suggested by anyone over more than a decade. After a relevant upgrading occurred at end 2010, DAMA/LIBRA-phase2 is in data taking in the new configuration equipped with new high quantum efficiency PMTs. The aim of the upgrade has been to lower the software energy threshold to 1 keV in order to improve the knowledge on corollary aspects regarding the signal. Here results, implications and experimental perspectives of the presently running DAMA/LIBRA--phase2 will be discussed.
        Speaker: Dr. Riccardo Cerulli (INFN-LNGS)
        Slides
      • 10:35
        Status of CoGeNT and C-4, and progress towards PICO-250l, a large bubble chamber for dark matter detection 25m
        We will discuss the status of CoGeNT and C-4, searches for low-mass WIMPs below 10 GeV/c^2. The performance of the first C-4 detector will be presented and compared to the previous generation of p-type point contact germanium detectors, employed in CoGeNT. First results from a sophisticated energy-time analysis of the 3.4 year CoGeNT dataset will be shown. This analysis considers not only the possibility of a WIMP signal from standard and non-standard galactic haloes, but also signatures from axion-like particles, as well as other scenarios able to account for a low-significance annual modulation. We will also discuss the ongoing status of PICO-250l, a large bubble chamber containing C3F8 or CF3I, to be installed at SNOLAB. PICO is the merger of the PICASSO and COUPP collaborations. Ongoing related activities at SNOLAB (PICO-2l and COUPP-60) will be presented.
        Speaker: Prof. Juan Collar (U. Chicago)
        Slides
    • 09:00 → 11:05
      BEH Physics: Standard Model Higgs Auditorium 1 ()

      Auditorium 1

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Prof. Pierre Savard (University of Toronto and TRIUMF)
      • 09:00
        Measurement of cross sections and couplings of the Higgs boson in the WW decay channel using the ATLAS detector 15m
        A review of the latest results on the measurment of the cross sections and couplings of the Higgs boson in the WW decay channel with the ATLAS detector is presented, using approximately 25 fb-1 of pp collision data collected at 7 TeV and 8 TeV in 2011 and 2012.
        Speaker: Corrinne Mills (University of Edinburgh)
        Slides
      • 09:15
        Measurements of Higgs boson production and properties in the WW decay channel with both W’s decaying into electrons or muons plus neutrino using the CMS detector 15m
        A search for the Higgs boson has been carried out in the Higgs to WW decay mode with the CMS detector at the LHC collider, where each W decays into an electron or photon and a neutrino. The analysis is based on pp collision data collected at centre-of-mass energies of 7 and 8 TeV, corresponding to integrated luminosities of 5/fb and 20/fb, respectively. The analysis strategy and measurements of the mass, coupling, and spin-parity are reported.
        Speaker: Pietro Govoni (Milano-Bicocca INFN and University)
        Slides
      • 09:30
        Search for the Higgs boson in VH(bb) channel using the ATLAS detector 15m
        Since the discovery of a Higgs boson by the ATLAS and CMS experiments at the LHC, the emphasis has shifted towards measurements of its properties and the search for less sensitive channels in order to determine whether the new particle is the Standard Model (SM) Higgs boson. Of particular importance is the direct observation of the coupling of the Higgs boson to b-quarks. In this talk a review of ATLAS results in the search for the Higgs boson in the VH production mode with the Higgs decaying to a b-quark pair decay will be given.
        Speaker: Dr. Paolo Francavilla (CNRS - LPNHE and ILP)
        Slides
      • 09:45
        Search for the Higgs boson in the bb decay channel using the CMS detector 15m
        A search for the Higgs boson has been carried out in the Higgs to bb channel with the CMS detector at the LHC collider. The production modes used are the associated VH production, the VBF production and the production in association with top quarks. The analyses are based on pp collision data collected at centre-of-mass energies of 7 and 8 TeV, corresponding to integrated luminosities of 5/fb and 20/fb, respectively. The strategy and results of the searches are reported.
        Speaker: Ms. Caterina Vernieri (Scuola Normale Superiore, Pisa)
        Slides
      • 10:00
        Search for Higgs bosons decaying to leptons with the CMS detector 20m
        A search for the SM Higgs boson has been carried out in the Higgs to tautau and mumu channels with the CMS detector at the LHC collider. In addition, a search for lepton-flavor-violating decays is reported. The analyses are based on pp collision data collected at centre-of-mass energies of 7 and 8 TeV, corresponding to integrated luminosities of 5/fb and 20/fb, respectively. For the SM Higgs boson search in the tautau channel, the analysis strategy and resulting evidence for this decay are summarized.
        Speaker: Dr. Jan Steggemann (CERN)
        Slides
      • 10:20
        Higgs Boson decays to Leptons with the ATLAS detector 15m
        A review of the latest results on Higgs boson decays to leptons with the ATLAS detector is presented, using approximately 25 fb-1 of pp collision data collected at 7 TeV and 8 TeV in 2011 and 2012.
        Speaker: Elias Coniavitis (Universität Freiburg)
        Slides
      • 10:35
        Enhancing the tt(bar)Higgs signal through top-quark spin polarization effects at the LHC 15m
        We compare the impact of top-quark spin polarization effects in Higgs (H) boson production in association with top-quark pairs and in corresponding backgrounds at the LHC. Because of the spin-zero nature of the Higgs boson, one expects, in the chiral limit for the top quarks, a substantial complementarity in tt(bar) spin correlations for a Higgs decaying into fermions/gauge-bosons and tt(bar) spin correlations for the corresponding irreducible tt(bar)ff(bar)/VV backgrounds. Although top mass effects in tt(bar)H production are in general dominant, and seriously spoil the chiral-limit expectations, one can find observables that capture the tt(bar) angular spin correlations and can help in separating the signal from irreducible backgrounds. In particular, we show that, for both H→bb(bar) and H→gamma-gamma, taking into account tt(bar) spin correlations in tt(bar)H production and irreducible backgrounds could appreciably improve the LHC sensitivity to the tt(bar)H channel.
        Speaker: Prof. Emidio Gabrielli (University of Trieste and NICPB Tallinn)
        Slides
    • 09:00 → 11:00
      Beyond the Standard Model Auditorium 2 ()

      Auditorium 2

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Prof. Gustavo Burdman (University of Sao Paulo)
      • 09:00
        CheckMATE: Confronting your Favourite New Physics Model with LHC Data 15m
        In the first three years of running, the LHC has delivered a wealth of new data that is now being analysed. With over 20 fb−1 of integrated luminosity, both ATLAS and CMS have performed many searches for new physics that theorists are eager to test their model against. However, tuning the detector simulations, understanding the particular analysis details and interpreting the results can be a tedious task. CheckMATE (Check Models At Terascale Energies) is a program package which accepts simulated event files in many formats for any model. The program then determines whether the model is excluded or not at 95% C.L. by comparing to many recent experimental analyses. Furthermore the program can calculate confidence limits and provide detailed information about signal regions of interest. It is simple to use and the program structure allows for easy extensions to upcoming LHC results in the future.
        Speaker: Dr. Jong Soo Kim (IFT Madrid)
        Slides
      • 09:15
        Discarding a 125 GeV heavy Higgs in an MSSM model with explicit CP-violation 15m
        We prove that the present experimental constraints are already enough to rule out the possibility of the 125 GeV Higgs found at LHC being the second lightest Higgs in a general MSSM context, even with explicit CP violation in the Higgs potential. Contrary to previous studies, we are able to eliminate this possibility analytically with a relatively small number of observables. We show that the present LHC constraints on the diphoton signal strength, tau-tau production through Higgs and indirect flavor bounds are enough to preclude the possibility of H2 being the observed Higgs with mH ~ 125 GeV within an MSSM context, without leaving room for finely tuned cancellations.
        Speaker: Mr. Cristian Bosch Serrano (University of Valencia)
        Slides
      • 09:30
        EWSB and CDM from strongly interacting hidden sector 15m
        We present a scale invariant extension of the standard model with new QCD-like strong interaction in the hidden sector. A scale ΛH is dynamically generated in the hidden sector by dimensional transmutation, and chiral symmetry breaking occurs in the hidden sector. This scale is transmitted to the SM sector by a real singlet scalar messenger S, and can trigger electroweak symmetry breaking (EWSB). Thus all the mass scales in this model arises from the hidden sector scale ΛH which has quantum mechanical origin. Furthermore the lightest hadrons in the hidden sector is stable by the flavor conservation of the hidden sector strong interaction, could be the cold dark matter (CDM). We study collider phenomenology, and relic density and direct detection rates of the CDM of this model.
        Speaker: Pyungwon Ko (KIAS)
        Slides
      • 09:45
        Electroweak strongly coupled models with a light Higgs 15m
        We study strongly coupled models of electroweak symmetry breaking with a light Higgs boson. We use a resonance effective Lagrangian with bosonic massive resonances together with the Standard Model degrees of freedom, including a light Higgs. We consider constraints from the phenomenology and from the assumed high-energy behavior of the underlying theory. This resonance effective theory can be used to estimate the low-energy constants (LECs) of the Electroweak Effective Theory in terms of resonance parameters and to make predictions of low-energy observables like, for instance, the oblique parameters.
        Speaker: Dr. Ignasi Rosell (Universidad CEU Cardenal Herrera & IFIC)
        Slides
      • 10:00
        Interplay between the Higgs and the inert dark matter 15m
        An interplay between the LHC results on the Higgs boson: measurement of the total width, invisible decays branching ratios and especially the signal strength in the decay of the Higgs boson to two photons, and the properties of the Higgs-portal dark matter (DM) in the Inert Doublet Model is analysed. The results are combined with the PLANCK constraints on the DM relic density, and strong constraints on the DM scenarios are derived. A comparison with the XENON and LUX results is presented.
        Speaker: Bogumila Swiezewska (University of Warsaw)
        Slides
      • 10:15
        SUSY Decays to Higgs bosons and their implications 15m
        We calculate with new precision the decays of SUSY particles to Higgs bosons. Using this new calculation we analyze the impact of these decays on current SUSY searches at the LHC as well as the prospects for measurements at a future e+e- collider.
        Speaker: Aoife Bharucha (TU Munich)
        Slides
      • 10:30
        The 125 GeV Higgs boson as the lightest Higgs in a general MSSM model with explicit CP-violation. 15m
        We analyze the LHC experimental results in a general MSSM setup including CP violation where the resonance found at 125 GeV corresponds to the lightest Higgs. In this framework, we rule out the possibility of having a Higgs mass spectrum aside from that corresponding to the decoupling limit. LHC constraints in Higgs decay to tau-tau, together with that of gamma gamma, are enough to reach this conclusion. Moreover, the excess in the diphoton channel found at CMS, corresponding to a second resonance at mH = 136 GeV, proves to be complicated to accomodate in any minimal SUSY extension.
        Speaker: Mrs. María Luisa López Ibáñez (Universidad de Valencia)
        Slides
      • 10:45
        Unitarity and causality constraints in composite Higgs models 15m
        We study the scattering of longitudinally polarized W bosons in extensions of the Standard Model where anomalous Higgs couplings to gauge sector and higher order O(p^4) operators are considered. These new couplings with respect to the Standard Model should be thought as the low energy remnants of some new dynamics involving the electroweak symmetry breaking sector. By imposing unitarity and causality constraints on the WW scattering amplitudes we find relevant restrictions on the possible values of the new couplings and the presence of new resonances above 300 GeV. We investigate the properties of these new resonances and their experimental detectability. Custodial symmetry is assumed to be exact throughout and the calculation avoids using the Equivalence Theorem as much as possible.
        Speaker: Dr. Federico Mescia (ECM, Universitat de Barcelona)
        Slides
    • 09:00 → 11:00
      Education and Outreach Sala 2 ()

      Sala 2

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Prof. Pedro Abreu (LIP and Instituto Superior Técnico, Universidade de Lisboa)
      • 09:00
        Netzwerk Teilchenwelt: A German programme on Particle Physics Education and Outreach 15m
        Netzwerk Teilchenwelt is a German network of HEP scientists, high school students, and teachers in direct contact with CERN. It aims at sharing the excitement of particle and astroparticle physics research. Scientists from 24 research institutes work with students and teachers to bring cutting edge research to the classroom. Programmes in particle physics and astroparticle physics are offered on four levels, ranging from one-day activities like a masterclass at school up to workshops at CERN and research projects at universities and institutes. Local projects happen throughout the year, every second school day Netzwerk Teilchenwelt organizes a masterclass somewhere in Germany. Netzwerk Teilchenwelt also focuses on the development of context material that can be used in classrooms.
        Speaker: Dr. Uta Bilow (TU Dresden)
        Slides
      • 09:15
        ‘Cascade’ Outreach Competitions for schools – an efficient way to introduce Particle Physics to many students 15m
        The Particle Physics group at the University of Birmingham has tried many different formats for Outreach competitions over recent years. We have found that a ‘Cascade’ competition is a very efficient way to introduce Particle Physics concepts and experiments to a wide range of students. Small groups of students research, prepare and deliver a short presentation to other students. We will describe variations on the format of this type of competition and include some examples from our winning entries. All the material that we have used for these competitions is freely available on the web which we hope will make it easier for more groups to try similar competitions in the future. The name Cascade emphasises that the competition aims to introduce and inform many students about Particle Physics. However relatively limited time is required from researchers and teachers to enable this. The students research the material themselves and give their presentations, which often include novel demonstrations well matched to the target age group, to younger students or students of their own age. The participants also gain valuable experience in teamwork from the challenge of producing and delivering a clear and interesting talk by all members of the team, as well as improving their own understanding of the subject during the process.
        Speaker: Prof. Peter Watkins (University of Birmingham)
        Slides
      • 09:30
        How the “HYPATIA” analysis tool is used as a hands-on experience to introduce HEP to high schools 15m
        The “ HYPATIA” (HYbrid Pupil’s Analysis Tool for Interactions in ATLAS) is a tool which has been created by the authors of this abstract and has been evolving over a number of years. Apart from the IPPOG’s International Masterclass downloadable HYPATIA version, there is an online version which now exists in the form of a webapp. All data from the ATLAS experiment at the Large Hadron Collider of CERN necessary for performing different educational analysis paths, exist online. Such examples of interactive analyses vary from the calculation of the magnetic field of one of the ATLAS magnets, to detecting “pseudo” Higgs events and will be given in the presentation. These applications have been used in recent years in a large number of schools in the form of a half a day mini local (or even remote) masterclass. These activities have been supported by various EC outreach programs which give emphasis to promoting science education in schools though new methods based on the inquiry based techniques: questions, search and answers. This way we have been able to introduce cutting edge research in particle physics to High Schools bridging the gap between research and school hands-on experience.
        Speaker: Prof. Kourkoumelis Christine (University of Athens and IASA)
        Slides
      • 09:45
        Sharing ATLAS data and research with young students 15m
        Sharing ATLAS data and research with young students Maiken Pedersen, Farid Ould-Saada, on behalf of the ATLAS Collaboration and IPPOG International Masterclasses In recent years the International Masterclasses (IMC) featured the use of real experimental data as produced by the LHC and collected by the detectors. We present ATLAS-based educational material using these data allowing high-school students to learn about properties of known particles and search for new phenomena. The ambition to bring to the “classrooms” important LHC discoveries is realised using the recent discovery of the Higgs boson. About 10% of the ATLAS discovery data are made available for students to search for the Higgs boson: 2fb-1 at 8 TeV for the Z-path, and 1 fb-1 at 7 TeV for the Wpath, in the 2014 version of IMC. The Higgs study samples constitute one third of the total sample including Z, W and other low mass resonances. The goal of the Zpath measurement is to rely on the invariant mass concept to identify and measure properties of known particles, such as the Z boson, inferred from the decay products, pairs of leptons. When a heavy gauge boson Z´ with mass 1 TeV is mixed with the real data, the simulated signal shows up in the di-lepton mass distribution, to the surprise of students, who realize that they have mastered a discovery tool. They go on and apply the same technique to di-photons and pairs of di-leptons to search for the Higgs boson. To help the buildup and display of the invariant mass distributions, we developed OPloT, a scalable, php-based web-plotting tool for submission and automatic combination of all measurements performed. This allows for prompt access of results for further discussion within institutes and during videoconferences. The W-Path deals, with the structure of the proton, by comparing the numbers of W+ and W-, and search for the Higgs into a pair of W bosons, by measuring the angle between the leptons stemming from the W bosons. Event-display files are read using Hypathia (Zpath) or Minerva (Wpath). The educational material is tuned and expanded to follow LHC “heartbeats”. In the future we hope to bring new discoveries to the public. Among new features being implemented in the Zpath, a signal of graviton resonances in di-lepton, di-photon mass distributions, and the exploiting of missing transverse energy to study di-lepton invariant mass endpoints of supersymmetric particles. Finally, a script is available for more advanced university students to loop through all events.
        Speaker: Mrs. Maiken Pedersen (University of Oslo)
        Slides
      • 10:00
        Data Portfolio: Instructional materials provide particle physics data in high school classrooms 15m
        We discuss Data Portfolio (DP), a new suite of activities that provide experimental particle physics data to high school students and a professional development program for their teachers. DP is a website resource with a broad range of instructional materials that allows teachers to select activities of the correct level and scope for their students. Activities range from introductory to survey, investigation and exploration. DP incorporates existing elements such as masterclasses and e-Labs along with new ways of introducing students to physics concepts that underlie the data measurements and investigations. Evaluators have determined that these elements are in line with the latest standards and effective instructional models. To be successful, teachers need to be confident to use the materials, comfortable to step back so students can guide their own learning, and clever to convince administrators that they are meeting school and district requirements. Professional development workshops accompany the DP where participants experience some of these activities as their students would and plan how to use them in their classes. The first weeklong DP workshop is this July at Fermilab. We have also held outreach workshops in conjunction with ILC workshops around the world. DP is a product of QuarkNet, a long-term professional development program embedded in the U.S. particle physics research community and funded by the National Science Foundation and the U.S. Department of Energy and supported by universities and labs across the country.
        Speaker: Ms. Marge Bardeen (Fermilab)
        Slides
      • 10:15
        The QuarkNet CMS masterclass: bringing the LHC to students 15m
        QuarkNet is an educational program which brings high school teachers and their students into the particle physics research community. The program supports research experiences and professional development workshops and provides inquiry-oriented investigations, some using real experimental data. The CMS experiment at the LHC has released several thousand proton-proton collision events for use in education and outreach. QuarkNet, in collaboration with CMS, has developed a physics masterclass and e-Lab based on this data. A masterclass is a day-long educational workshop where high school students travel to nearby universities and research laboratories. There they learn from LHC physicists about the basics of particle physics and detectors. They then perform a simple measurement using LHC data, and share their results with other students around the world via videoconference. The U.S. Masterclass includes three activities that QuarkNet teachers use to prepare students for the trip to the university or lab. Data show that this preparation enhances the student experience. Since 2011 thousands of students from over 25 countries have participated in the CMS masterclass as organised by QuarkNet and IPPOG, the International Particle Physics Outreach Group. We describe here the masterclass exercise: the physics, the online event display and database preparation behind it, the measurement the students undertake, their results and experiences, and future plans for the exercise.
        Speaker: Dr. Thomas McCauley (University of Notre Dame)
        Slides
      • 10:30
        LHCb Masterclass measurement of the D0 lifetime 15m
        The LHCb experiment is a general purpose spectrometer in the forward region optimized for precision studies of beauty and charm hadron properties. The volumes of data produced by the LHC make it possible to perform such precision measurements with only a fraction of the total LHCb dataset, making it an ideal playground for developing new types of masterclass exercises. We present here LHCb's first foray into the masterclass programme, in which students are taught how to make a 1% precision measurement of the D0 meson lifetime. The students learn to separate D0 mesons from the background in LHCb's vertex detector and build up a signal mass peak, before learning about how to use background sidebands to extract the signal properties in other variables of interest. They then perform a fit to measure the D0 lifetime, and discover that the result is biased by charm produced in the decays of B hadrons, which has an artificially long lifetime compared to charm produced directly in the proton-proton collision. Finally, the students learn how to separate these two kinds of charm based on the D0 mesons distance of closest approach to the primary interaction and obtain a precise measurement in agreement with the world average. We present the software framework developed for this exercise, give a demonstration of the exercise, and discuss plans for the future.
        Speaker: Ms. Ana Trisovic (CERN, Geneva, Switzerland)
        Slides
      • 10:45
        Hangout With CERN: A direct conversation with the public 15m
        On 4 July 2012, particle physics became a celebrity. Around 1,000,000,000 people (yes, 1 billion) saw rebroadcasts of two technical presentations announcing the discovery of a new boson. The occasion was a joint seminar of the CMS and ATLAS collaborations, and the target audience were particle physicists. Yet the world ate it up like a sporting event. Roughly two days later, in a parallel session of ICHEP in Melbourne, Australia, a group of physicists decided to explain the significance of this discovery to the public. They used a tool called “Hangout”, part of the relatively new Google+ social media platform, to converse directly with the public via a webcast videoconference. The demand to join this Hangout overloaded the server several times. In the end, a compromise involving Q&A via comments was set up, and the conversation was underway. We present a new project born shortly after this experience called Hangout with CERN, and discuss its success in creating an effective conversational channel between the public and particle physicists. We review earlier efforts by both CMS and ATLAS contributing to this development, and then describe the current programme, involving nearly all aspects of CERN, and some topics that go well beyond that. We conclude by discussing the potential of the programme both to improve our accountability to the public and to train our community for public communication.
        Speaker: Mr. Achintya Rao (CMS Experiment, CERN)
        Slides
    • 09:00 → 11:00
      Flavour Physics Sala 8+9 ()

      Sala 8+9

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Prof. Thomas E Browder (University of Hawaii)
      • 09:20
        Probing the New Physics scale with the Unitarity Triangle fit 20m
        The Unitarity Triangle (UT) analyses within and beyond the SM are powerful tools to summarise the state of the art and explore the possibilities for future new physics (NP) searches. We present the update of the Unitarity Triangle analysis in a scenario beyond the Standard Model. Combining all available experimental and theoretical information on DF=2 processes and using a model-independent parametrisation, we extract the allowed NP contributions in the kaon, D, Bd, and Bs sectors. Then in various NP scenarios, we extract the NP lower scale as function of the NP coupling with the SM.
        Speaker: Dr. Denis Derkach (University of Oxford)
        Slides
      • 09:40
        FlavorKit: flavor physics beyond the standard model 15m
        We present a new kit for the study of flavor observables beyond the standard model. In contrast to previous flavor codes, FlavorKit is not restricted to a single model, but can be used to obtain predictions for flavor observables in a wide range of models (SUSY and non-SUSY). FlavorKit can be used in two different ways. The basic usage of FlavorKit allows for the computation of a large number of lepton and quark flavor observables, using generic analytical expressions for the Wilson coefficients of the relevant operators. The setup is based on the public codes SARAH and SPheno, and thus allows for the analytical and numerical computation of the observables in the model defined by the user. If necessary, the user can also go beyond the basic usage and define his own operators and/or observables. For this purpose, a Mathematica package called PreSARAH has been developed. This tool uses FeynArts and FormCalc to compute generic expressions for the required Wilson coefficients at the tree- and 1-loop levels. Similarly, the user can easily implement new observables. With all these tools properly combined, the user can obtain analytical and numerical results for the observables of his interest in the model of his choice.
        Speaker: Dr. Avelino Vicente (Université de Liège)
        Slides
      • 09:55
        Measurement of the phase of Bs mixing with Bs→J/ψhh decays 15m
        The Bs meson provides an ideal laboratory for measurements of CP violation and searches for CPV beyond the Standard Model. We present recent LHCb results on measurements of the Bs mixing phase using Bs→J/ψKK and J/ψππ decays.
        Speaker: Mr. Roel Aaij (Nikhef)
        Slides
      • 10:10
        Measurement of the CP-violating phase phi_s in the B_s->J/psi phi decays at CMS 15m
        In this talk we present a measurement of the time-dependent CP-violating phase phi_s in the decays of B_s -> J/psi phi. The phase phi_s is the key parameter for the CP-violation of the B_s and anti-B_s system. An angular and proper decay time analysis is applied to the Bs->J/psi phi events. Using a data sample collected by the CMS experiment, the Bs signal candidates are reconstructed and are used to extract the phase phi_s. The theoretical prediction of the phi_s angle is particularly robust, thus any deviation from the prediction can be a smoking gun signal of new physics. A similar decay, B_s->J/psi f0 can also provide the information on the same mixing phase. This talk might also include the study of lifetime in B_s->J/psi f0 decays, if approved in time.
        Speaker: Mr. Giacomo Fedi (University of Helsinki)
        Slides
      • 10:25
        Decay properties of b-hadrons with the ATLAS experiment 15m
        The ATLAS detector at the LHC is collecting - among others - a large statistics of Bs and Lambda_b decays, allowing to study their production and decay properties. ATLAS has studied the different amplitudes contributing to the decay Bs -> J/psi phi (mu+mu-K+K-) with a combined analysis of decay time and angular correlations and using initial flavour tagging. The CP-violating phase phi_s is measured, as well as the width difference between the Bs eigenstates DeltaGamma_s and the average width Gamma_s. ATLAS collects also large samples of Lambda_b decays and measures the parity violating asymmetry parameter alpha_b in Lambda_b -> Lambda J/psi. The measurement - obtained from the measurement of angular correlations in the lambda_b final state - is compared to predictions based on perturbative QCD and heavy quarks effective theory.
        Speaker: Dr. Leonid Gladilin (Joint Institute for Nuclear Research (JINR))
        Slides
      • 10:40
        Study of b-hadron to J/ψhh decays 15m
        b-hadron decays to J/ψ and light mesons and/or baryons allow to perform studies in the J/ψhh "Dalitz" decay plane. We determine the resonant structure and CP components of B→J/ψKK and ππ, which serve as input to CP violation studies. We also report the observation of new decay modes of the Bc meson and the Λb baryon.
        Speaker: Dr. Liming Zhang (Syracuse University)
        Slides
    • 09:00 → 11:00
      Heavy Ions Sala 6+7 ()

      Sala 6+7

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Dr. David d'Enterria (CERN)
      • 09:00
        Soft probes of the QGP measured by ALICE 20m
        The combination of multiple particle identification systems along with the excellent tracking capabilities makes ALICE a unique tool to study QCD matter at high-temperature and density. The measurements of light flavor hadron production and multi-particle correlations over a broad transverse momentum ($p_{\mathrm{T}}$) range from 100 MeV/c up to 20 GeV/c, are the main soft probes of the quark-gluon plasma (QGP), system created in ultrarelativistic heavy-ion collisions. In this talk an overview of the ALICE results on light flavor hadron production, azimuthal flow, long-range angular correlations and femtoscopy measurements in Pb-Pb collisions at $\sqrt{s_{NN}} = 2.76$ TeV will be presented. The results will be compared to hydrodynamic calculations. In addition, particle production will be also compared to results from statistical models. In order to show the evolution of the soft probes with the size of the collision system the results from the pp and p-Pb collisions will also be presented.
        Speaker: Mr. Marek Chojnacki (University of Copenhagen, Niels Bohr Institute)
        Slides
      • 09:20
        Soft probes of the QGP: Pb-Pb and p-Pb CMS results 20m
        Measurements of soft particle production probe the collectivity of the medium created in heavy-ion collisions. This presentation focuses on measurements of two- and multi-particle angular correlations in pPb and PbPb collisions. Particular emphasis is placed on studies of long-range correlations in high multiplicity pPb collisions.
        Speaker: Dr. Jovan Milosevic (University of Belgrade, Faculty of Physics and Vinca Institute of Nuclear Sciences)
        Slides
      • 09:40
        Recent Results on Soft Probes of the Quark-Gluon Plasma from the ATLAS Experiment at the LHC 20m
        Measurements of low-pT (< 5 GeV) particle production have provided valuable insight on the production and evolution of the quark-gluon plasma in Pb+Pb collisions at the LHC. In particular, measurements of elliptic and higher order collective flow imprinted on the azimuthal angle distributions of low-pT particles directly probe the strongly-coupled dynamics of the quark-gluon plasma and test hydrodynamic model descriptions of its evolution. The large acceptance of detectors like ATLAS has made it possible to measure flow event-by-event and to determine the correlations between different harmonics. Recent measurements of low-pT particle production and multi-particle correlations in proton-lead collisions have shown features similar to the collective flow observed in Pb+Pb collisions. Results will be presented from a variety of single and multi-particle measurements in Pb+Pb and proton-Pb collisions that probe the collective dynamics of the quark-gluon plasma and possibly provide evidence for collectivity in even small systems.
        Speaker: Prof. Mariusz Przybycien (AGH University of Science and Technology (Poland))
        Slides
      • 10:00
        Heavy-ion physics with high-energy eA scattering 20m
        The Large Hadron Electron Collider (LHeC) at CERN is a proposed facility for electron-nucleus scattering which will collide electrons of about 60 GeV energy beam, with the LHC heavy ion beams. The kinematic coverage extends beyond previous deep inelastic lepton-ion experiments by nearly four orders of magnitude towards lower $x_{Bj}$ and higher $Q^2$. This contribution reviews the possibilities for eA studies at the LHeC plus its relation with the LHC PbPb and pPb programs. After an introduction on the open problems in pA and eA collisions and their expected impact on the heavy-ion program, we show inclusive observables and new results on the resulting constraints on nuclear parton densities. We then analyse the possibilities for inclusive and exclusive diffraction and the opportunities that they offer to reveal the non-linear dynamics which should tame the low-$x$ growth of parton densities. Finally, we discuss semi-inclusive measurements that will clarify the mechanism of hadronisation and QCD radiation inside the nuclear medium.
        Speaker: Dr. Maria Zurita (University of Santiago de Compostela)
        Slides
      • 10:20
        Pion production in p+p and Be+Be interactions at the CERN SPS energies 20m
        Evidence for the onset of deconfinement in central Pb+Pb collisions was reported by NA49 in fixed target measurements at beam momentum 30A GeV/c. This observation motivated the NA61/SHINE program started in 2009 at CERN SPS, which, in particular, aims to study properties of the onset of deconfinement by measurements of hadron production in proton-proton, proton-nucleus and nucleus-nucleus collisions. This contribution presents spectra of charged pions produced in p+p interactions and ⁷Be+⁹Be collisions at 20A–158A GeV/c beam momentum. The NA61/SHINE results will be compared with the corresponding NA49 data from central Pb+Pb collisions at the same beam momenta per nucleon.
        Speaker: Mr. Antoni Aduszkiewicz (University of Warsaw)
        Slides
      • 10:40
        PHENIX Results in d+Au Collisions 20m
        The PHENIX experiment at the Relativistic Heavy Ion Collider has performed a comprehensive set of measurements in d+Au collisions. Observables in d+Au collisions were originally conceived as a control experiment where no quark-gluon plasma is formed and one could isolate so-called cold nuclear matter effects, including nuclear modified parton distributions and parton multiple scattering. However, recent data from the PHENIX experiment in d+Au, in conjunction with new p+Pb results at the Large Hadron Collider, give strong evidence for a very different picture. We present new results that hint at the formation of a small quark-gluon plasma, that though short lived, leaves a fingerprint of evidence on final state observables. These new results will be discussed in the context of competing theoretical interpretations.
        Speaker: Dr. Chin-Hao Chen (RIKEN BNL Research Center)
        Slides
    • 09:00 → 11:00
      Neutrino Physics: Three-Neutrino Oscillations, Part II Auditorium 3B ()

      Auditorium 3B

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Prof. Jun Cao (Institute of High Energy Physics)
      • 09:00
        Solar neutrinos in Super-Kamiokande 13m
        Recently the concern with the effect of matter on the neutrino oscillation has been growing, because the possibility of mass hierarchy determination by next generation experiments through the matter effect has been recognized. We report an indication that the elastic scattering rate of solar B8 neutrinos with electrons in the Super-Kamiokande detector is larger when the neutrinos pass through Earth during nighttime. This is the first direct indication that neutrino oscillation probabilities are modified by the presence of matter. We determine the day-night asymmetry, defined as the difference of the average day rate and average night rate divided by the average of those two rates, to be [−3.2±1.1(stat)±0.5(syst)]%, which deviates from zero by 2.7σ. Since the elastic scattering process is mostly sensitive to electron-flavored solar neutrinos, a nonzero day-night asymmetry implies that the flavor oscillations of solar neutrinos are affected by the presence of matter within the neutrinos’ flight path. Super-Kamiokande’s day-night asymmetry is consistent with neutrino oscillations for 4×10−5  eV^2≤Δm^2_21≤7×10^−5  eV2 and large mixing values of θ_12, at the 68% C.L. We also report the measured recoil electron spectrum whose shape should reflect the transition between vacuum dominated oscillations (lower energy solar neutrinos) and matter dominated oscillations (higher energy solar neutrinos).
        Speaker: Dr. Hiroyuki Sekiya (ICRR, University of Tokyo)
        Slides
      • 09:15
        Current status of the Double Chooz experiment 13m
        The Double Chooz reactor antineutrino experiment aims for a precision measurement of the neutrino mixing angle $\theta_{13}$. Located at the Chooz nuclear power plant in France, it observes an energy dependent deficit in the neutrino spectrum, currently with one detector filled with gadolinium-loaded liquid scintillator at a baseline of 1.05\,km. The past Double Chooz publications featured different analysis approaches: The $\theta_{13}$ result was not only provided via rate-only analysis of the deficit in neutrino flux; a combined rate and spectral shape fit as well as a background model independent analysis based on reactor power variations were performed, giving consistent results. Besides that, Double Chooz has been the first experiment to determine $\theta_{13}$ using the neutrino detection channel via neutron captures on hydrogen nuclei. Among the recent reactor-based oscillation experiments with comparable baseline it was the only one to observe scheduled reactor shutdown phases. These enabled to measure the background spectrum solely, allowing to crosscheck the background models used in the oscillation analysis. At present an improved analysis is in progress with twice as much data statistics collected compared to the last publication. Revised selection criteria and background studies enhance the signal to background ratio while a reduction in the corresponding uncertainties is achieved. Along with an improved energy calibration the overall systematic uncertainty on $\theta_{13}$ is decreased preparing for a two detector analysis. In the near future the second identically constructed detector will commence operation at 400 meters distance to the reactor cores, leading to a cancellation of correlated systematic uncertainties, which allows for a high precision $\theta_{13}$ measurement.
        Speaker: Julia Haser (Max-Planck-Institut fuer Kernphysik)
        Slides
      • 09:30
        The latest oscillation results from the Daya Bay reactor neutrino experiment 13m
        The Daya Bay reactor neutrino experiment (Daya Bay) is one of the three current-generation short-baseline reactor neutrino experiments designed to measure the lastly known neutrino mixing angle theta13. Its unique design of eight identical 20t liquid scintillator (LS) antineutrino detectors (AD) at the three near and far experimental sites does not only make it the most sensitive theta13 experiment but also provides the flexibility of re-arranging ADs. Daya Bay was able to discover the non-zero theta13 value using the first completed six ADs at an earlier stage of the experiment by adapting a 2-1-3 detector arrangement scheme. By establishing a precise energy model of the ADs, Daya Bay has further improved the precision of sin22theta13 to ~10% and measured the atmospheric mass-squared splitting dm2atm using electron-flavor reactor antineutrinos for the first time. The dm2atm measurement of Daya Bay is consistent with the one using muon-flavor (anti)neutrinos. The Daya Bay experiment has completed, installed and commissioned all eight ADs since Fall 2012 and has collected the largest reactor antineutrino dataset. The unpaired dataset has enabled the study of physics topics like oscillation analysis using neutron captured on hydrogen events, sterile neutrino search and other standard or exotic physics. Looking into the future, Daya Bay is expected to measure sin22theta13 to ~3% precision and dm2atm to a precision better than the current one by MINOS. The discovery and the precision measurement of non-zero theta13 have enabled other physics opportunities in neutrino physics. This talk will report the latest oscillation results and the current status with emphases on precision oscillation analysis and future prospect.
        Speaker: Dr. Wei Wang (College of William and Mary, Sun Yat-Sen University)
        Slides
      • 09:45
        JUNO: A Next Generation Reactor Antineutrino Experiment 13m
        After the discovery of the large neutrino mixing angle 13, the next generation neutrino experiments focus on the measurement of the neutrino mass hierarchy and the leptonic CP violating phase. JUNO, a next generation reactor antineutrino experiment, was proposed to determine the neutrino mass hierarchy independent of the CP phase. We studied the sensitivity and found the mass hierarchy can be determined with a 3σ significance after 6 years of running using a 20 ktons detector with an energy resolution of 3%/√Evis at a 45-60 km baseline. This is a multi-purpose experiment, which can also measure the neutrino mixing parameters sin^2theta_12,DeltaM^2_32 and DeltaM^2_21 with a precision better than 1%. In addition, supernova neutrinos, geo-neutrinos, sterile neutrinos as well as solar and atmospheric neutrinos can be studied with this experiment. JUNO was approved in 2013 and the R&D progress will be reported.
        Speaker: Dr. Liang Zhan (Institute of High Energy Physics)
        Slides
      • 10:00
        Statistical issues in neutrino mass ordering sensitivity 13m
        During the last two years, there has been some confusion in the field on how to assess the sensitivity of future neutrino oscillation experiments to the neutrino mass ordering. A factor of two difference to the common approach has been proposed. We resolve the situation by going back to the basic statistical definitions and apply the results to compare future possibilities of experiments aiming for determination of the mass ordering. We find that the typical median sensitivity measure is very close to that given by the common approach. We also discuss other possible measures of sensitivity and briefly discuss other situations where the method is applicable, such as for the determination of the octant of theta23.
        Speaker: Dr. Mattias Blennow (KTH Royal Institute of Technology)
        Slides
      • 10:15
        Neutrino oscillation study with atmospheric neutrinos in Super-Kamiokande 13m
        Atmospheric neutrinos have been playing important roles in understanding neutrino properties. In Super-Kamiokande, we have been performing precise measurement of the 2-3 mixing angle and mass squared difference predominantly by muon neutrino disappearance. In addition to that, muon to tau neutrino oscillation channel was established by confirming tau neutrino appearance in the atmospheric neutrinos. We also have good opportunity to study the mass hierarchy and leptonic CP violation by investigating possible electron (and muon) neutrino flux changes. Super-K analysis is being improved especially to enhance the discrimination power of the mass hierarchy by statistical neutrino-antineutrino separation and by combining with reactor and LBL results. We can also test various exotic scenarios such as oscillations between active and sterile neutrinos, and possible Lorentz invariance violation. Latest results of atmospheric neutrino studies in Super-Kamiokande will be reported in this talk.
        Speaker: Masato SHIOZAWA (Kamioka Observatory, ICRR, University of Tokyo)
        Slides
      • 10:30
        PINGU and the Neutrino Mass Hierarchy 13m
        The Precision IceCube Next Generation Upgrade (PINGU) is a proposed IceCube in-fill array designed to measure the neutrino mass hierarchy using atmospheric neutrino interactions in the ice at the South Pole. PINGU will have a neutrino energy threshold of a few GeV with a multi-megaton effective volume. We present PINGU's expected sensitivity to the hierarchy with an optimized geometry and with consideration of a full complement of systematic uncertainties. We also briefly present PINGU sensitivity to other topics in neutrino oscillations, as well as to low-mass dark matter.
        Speaker: Dr. Kenneth Clark (University of Toronto)
        Slides
      • 10:45
        India-Based Neutrino Observatory (INO) Project 13m
        India-based Neutrino Observatory (INO) is a proposed underground facility in the southern part of India. The project envisage the construction of an underground laboratory with a large cavern of dimensions 132m X 26m X 20m to house a 50 kton magnetized iron tracking calorimeter detector (ICAL) to study atmospheric neutrinos. In addition, two smaller caverns will also be constructed to host other experiments. There will be at least 1.2 km rock overburden in all directions. INO-ICAL detector will have a modular structure of total lateral size 48m X 16m and will consist of a stack of 150 horizontal layers of 5.6 cm thick magnetized iron plates interleaved with 4 cm gaps to house the active detector layers. The active detector elements are resistive plate chambers (RPCs), made up of a pair of 3mm thick glass plates of area 2m X 2m , separated by 2mm spacers. The main physics goals of INO-ICAL detector are: (i) Accurate determination of the atmospheric parameters. (ii)Determination of neutrino mass hierarchy. (iii)Resolve the octant ambiguity. (iv) Non-standard interactions, CPT violation, long range forces, ultra high energy muon fluxes. The present status of the project and the progress made so far will be discussed.
        Speaker: Prof. Sanjib Kumar Agarwalla (Institute of Physics, Bhubaneswar, India)
        Slides
    • 09:00 → 11:05
      Strong Interactions and Hadron Physics: Jets I (V+jets) Sala 3+4 ()

      Sala 3+4

      Allocated time include time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Conveners: Daniel de Florian de Florian (Universidad de Buenos Aires), Dr. Ulla Blumenschein (Goettingen university)
      • 09:00
        Resummation and jet vetos 25m
        I review recent developments in resummation in perturbative QCD, with special regards to its application to the computation of observables involving jets and jet vetos.
        Speaker: Dr. Pier Monni (University of Oxfored)
        Slides
      • 09:25
        Hadronically decaying massive particles, jet substructure, and measurement of the transverse momentum of the Z boson at LH 15m
        The identification and study of jets originated from the hadronic decays of massive particles, like vector bosons or top quark provide a direct test of QCD calculations of gluon and quark radiation and validate novel techniques of jet shapes and jet substructure for reducing the sensitivity to soft QCD and to multiple proton-proton collisions. The measurement of the cross-section of high transverse momentum Z->bbbar production in proton-proton collisions at sqrt{s}=8 TeV at LHC is presented and compared to next-to-leading order predictions. In addition, a measurement of jet shapes in t-tbar final states using data recorded at LHC in presented. Samples of events with top-quark pairs are selected and the differential and integrated shapes of the b-quark jets resulting from the top-quark decays are compared with those of the light-quark jets from the hadronic W-boson decays W -> q¯q' in the semileptonic channel. The measurement of the transverse momentum of the Z boson performed at LHC is reported for sqrt{s) = 7 TeV. The measurement is sensitive to soft resummation effects for small momentum transfers and to multiple hard jet emissions for large momentum transfers, probing QCD in a unique way. The data are used to tune next-to-leading order plus parton shower Monte Carlo simulations.
        Speaker: Francesco De Lorenzi (Iowa State University)
        Slides
      • 09:40
        Vector Boson + jets production at the Tevatron 15m
        Studies of associated production of a vector bosons with heavy quarks (b/c) provide important tests of perturbative quantum chromodynamics calculations, important constraints on parton distribution functions, and good understanding of major backgrounds in Higgs studies and searches for new phenomena. We present several measurements of vector boson with heavy quark processes production at the Tevatron experiments, CDF and D0. We present measurements of W+bX and W+cX production and the ratio of Z+bb(bar) to Z+ jets production using Run 2 Tevatron data collected by the D0 detector. The measurements are performed for the integrated acceptance as well differentially as a function of leading jet transverse momenta. We also present first measurements of the cross section of photon plus bottom quark pair production in proton-antiproton collisions at sqrt(s)=1.96 TeV using Tevatron data collected by the D0 experiment as well as the ratio of cross sections for photon plus two b-quark jets to photon plus b-jets production as a function of photon transverse momentum. We present the first measurements of W/Z+c production at low c-quark pT (pT < 15 GeV) by measuring the cross-section ratios of σ(W+D*)/σ(W) and σ(Z+D*)/σ(Z) in the W/Z leptonic decay channels, for p_T(D*)>3 GeV with data collected by the CDF detector. We also present a search for Upsilon(1S) production in association with a vector boson using data collected by the CDF detector, providing the best cross-section limits for these processes and also providing a guide to limits on new physics processes producing an Upsilon+W/Z. In all cases, results are compared to current theory calculations as well as predictions from Monte Carlo generators.
        Speaker: Dr. Keith Matera (University of Illinois at Urbana)
        Slides
      • 09:55
        Measurements of light and heavy-flavour jet production in association with a W or Z boson with the ATLAS detector 20m
        Productions of light and heavy-flavour jets in association with a W or a Z boson in proton-proton collisions are important processes to study QCD in multi-scale environments and the proton parton content. The cross section, differential in several kinematics variables, have been measured with the ATLAS detector in 7 TeV proton-proton collisions and compared to high-order QCD calculations and Monte Carlo simulations. The results demonstrate the need for the inclusion of high-multiplicity matrix elements in the calculations of high jet multiplicities, even in cases where a parton shower simulation is present and confirm QCD jet production scaling properties. The ratio of (Z+jets)/(W+jets) provides a precise test of QCD due to the large cancellations of theoretical and experimental uncertainties. Measurement of W+c production cross section has a unique sensitivity to the strange-quark density, which is poorly known at low x. W or Z boson production in association with b-quark jets, on the other hand, probes the b-quark density in the proton and the b-quark production by high-order QCD processes. The experimental results are compared to leading-order and next-to-leading-order QCD calculations and various parton density predictions.
        Speaker: Dr. Gavin Grant Hesketh (UCL)
        Slides
      • 10:15
        Production of vector bosons and jets at CMS 20m
        The production cross section of highly boosted vector bosons (V = W, Z) recoiling against jets is studied, with CMS data, differentially as function of the transverse momentum and angular correlations of the final state particles. The mechanism of production of heavy-flavoured mesons, containing b or c quarks, in association with vector bosons, W or Z, in the Standard Model is only partially understood. The study of events with one or two well-identified and isolated leptons accompanied by b-jets or b-mesons is therefore crucial to refine the theoretical calculations in perturbative QCD, as well as validate associated Monte Carlo techniques. A measurement of the WZ and ZZ production cross sections in proton-proton collisions at 8 TeV in final states where one Z boson decays to b-tagged jets, while the other gauge boson, either W or Z, is detected through its leptonic decay is also presented.
        Speaker: Dr. Fabio Cossutti (INFN Trieste)
        Slides
      • 10:35
        Measurement of photon and diphoton production processes at CMS 15m
        We present differential cross-section measurements of inclusive photon production, photon+jet production, and diphoton production in pp collisions based on data recorded by the CMS detector at the LHC. The associated production of a photon and one or more jets in pp collisions provides a direct probe into the hard QCD interaction, is sensitive to gluon densities in the proton, and is a major source of background to standard model searches. The measured distributions are corrected for efficiency and unfolded for detector effects are compared with event generators and theoretical predictions.
        Speaker: Mr. Andrea Carlo Marini (ETH Zürich (Switzerland))
        Slides
      • 10:50
        Photon, diphoton and photon+jet production measured with the ATLAS detector 15m
        Isolated prompt photons provide a direct probe of short-distance physics, complementary to that provided by measurements of jets or vector-bosons. The data are sensitive to the gluon density of the proton.  The inclusive prompt photon cross sections have been measured over a wide range of transverse momenta; the diphoton cross section has also been measured as a function of diphoton mass, total transverse momentum and azimuthal  separation. The cross section for photons produced in association with jets is also measured as a function of various kinematic variables describing the photon+jet system. The results are compared to the predictions of next-to-leading-order QCD.
        Speaker: Dr. Lily Asquith (Argonne)
        Slides
    • 11:00 → 11:30
      Coffee 30m
    • 11:30 → 13:30
      Astroparticle Physics and Cosmology Auditorium 3A ()

      Auditorium 3A

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Mr. Juande Zornoza (IFIC)
      • 11:30
        A first walk on the DarkSide 18m
        DarkSide-50 (DS-50) at Gran Sasso underground laboratory, Italy, is a direct dark matter search experiment based on a TPC with liquid argon from underground sources. The DS-50 TPC, with 50 kg of active argon and a projected fiducial mass of >33 kg, is installed inside an active neutron veto based on a boron-loaded organic scintillator. The neutron veto is built inside a water cherenkov muon veto. DS-50 has been taking data since Nov 2013, collecting more than 2e7 events with atmospheric argon. This data represents an exposure to the largest background, beta decays of Ar-39, comparable to the full three-year run planned for DS-50 with underground argon. When analyzed with a threshold that would give a sensitivity in the full run of about 1e-45 cm^2 at a WIMP mass of 100 GeV/c^2, there is no Ar-39 background observed. The detector design and performance will be presented as well as results from the atmospheric argon run. Plans for the underground argon run and for a ton-scale detector within the same neutron veto vessel will be presented.
        Speaker: Dr. Stefano Davini (University of Houston)
        Slides
      • 11:48
        The status of KIMS-NaI experiment 18m
        Although an observation of the dark matter is higly interesting in physics community, an observation of the WIMP, strong candidates of dark matter particles, claimed by DAMA/LIBRA experiment has not yet been clearly proved. Many advanced compelling experiments have observed null signals claiming rejections of the DAMA/LIBRA observation, but still some model dependent interpretations are alived. To prove the DAMA/LIBRA observation without any model dependent argument, it is very important to perform an experiment using same detector for same annual modulation signature. Newly established KIMS-NaI experiment uses NaI(Tl) crystals as a scintillator to search WIMP in the Yangyang underground laboratory. We have planned growing of low background NaI(Tl) crystals about 200kg for the annual modulation searches in the same way of DAMA/LIBRA. The status including crystal growing, background characterization, and its reduction as well as the future prospect of KIMS-NaI experiment will be presented.
        Speaker: Prof. Hyun Su Lee (Ewha Womans University)
        Slides
      • 12:42
        DEAP-3600 Dark Matter Search at SNOLAB 18m
        The DEAP-3600 experiment is located 2 km underground at SNOLAB, in Sudbury, Ontario. It is a single-phase detector, which searches for dark matter particle interactions with 1 tonne fiducial mass of liquid argon target. A first generation prototype detector (DEAP-1) with a 7-kg liquid argon target mass demonstrated a high level of pulse-shape discrimination (PSD) for reducing beta/gamma backgrounds and helped to develop low radioactivity techniques to mitigate surface related alpha backgrounds. Construction of the large detector containing a total mass of 3600 kg of liquid argon is nearly complete. The target sensitivity to spin-independent scattering of Weakly Interacting Massive Particles (WIMPs) on nucleons of 10^-46 cm^2 will allow one order of magnitude improvement in sensitivity over current searches at 100 GeV WIMP mass. DEAP-3600 commissioning starts summer 2014. This talk will present an overview and status of the project.
        Speaker: Dr. Marcin Kuzniak (Queen's University)
        Slides
      • 13:00
        Direct Dark Matter Searches: Status and Implications 30m
        Direct dark matter searches look for the scattering of dark matter particles from the galactic halo off nuclei in laboratory detectors. A host of apparently contradictory experimental results have been accumulated over the past few years: unexplained events in excess of the expected background, annual modulations with the predicted characteristics of a dark matter signal, upper limits stronger than the possible detections. In this overview, I will present a theorist's perspective on the present-day situation, indicating current trends on the experimental and theoretical scenes.
        Speaker: Prof. Paolo Gondolo (University of Utah)
        Slides
    • 11:30 → 13:30
      BEH Physics Auditorium 1 ()

      Auditorium 1

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Prof. Pierre Savard (University of Toronto and TRIUMF)
      • 11:30
        Search for Charged Higgs Bosons with the ATLAS Detector 15m
        Several non-minimal Higgs scenarios, e.g. Two Higgs Doublet Models (2HDM), predict the existence of charged Higgs bosons. This talk describes searches for charged Higgs bosons produced in top quark decays, in association with a top quark, or decaying to a tau lepton and a neutrino using the Run I data collected by the ATLAS detector at the LHC.
        Speaker: Mrs. Liron Barak (Weizmann Institute of Science)
        Slides
      • 11:45
        Searches for MSSM and NMSSM Higgs bosons with the CMS detector 15m
        Several searches for Higgs bosons have been carried out with the CMS detector at LHC. The analyses are based on pp collision data collected at centre-of-mass energies of 7 and 8 TeV, corresponding to integrated luminosities of 5/fb and 20/fb, respectively. Some of them can be interpreted in the framework of the MSSM and NMSSM Supersymmetric models. Given that no evidence of Higgs bosons, in addition to the discovered SM-like 126 GeV Higgs boson, has been found, exclusion limits have been derived.
        Speaker: Dr. Christian Veelken (LLR/Ecole Polytechnique)
        Slides
      • 12:00
        Nonstandard Higgs decays in the E6 inspired SUSY models 15m
        We study the decays of the SM-like Higgs state within the $E_6$ inspired supersymmetric (SUSY) model based on the SM gauge group together with an extra $U(1)_{N}$ gauge symmetry under which right--handed neutrinos have zero charge. To ensure anomaly cancellation and gauge coupling unification the low energy matter content of this SUSY model involves three $27$ representations of $E_6$ and a pair of $SU(2)$ doublets from additional $27$ and $\overline{27}$. In addition, we impose a $\tilde{Z}^{H}_2$ symmetry to forbid tree--level flavor--changing transitions and the most dangerous baryon and lepton number violating operators. This model contain at least two states which are absolutely stable and can contribute to the dark matter density. One of them is the lightest SUSY particle (LSP) which is expected to be lighter than $1\,\mbox{eV}$ forming hot dark matter in the Universe. The presence of another stable neutral state which is the lightest ordinary neutralino can account for all or some of the observed cold dark matter density. In this SUSY model the next--to--lightest SUSY particle (NLSP) also tend to be light. We argue that the NLSP with GeV scale mass can result in the substantial branching ratio of the nonstandard decays of the SM--like Higgs boson into NLSPs.
        Speaker: Dr. Roman Nevzorov (University of Adelaide)
        Slides
      • 12:15
        High Precision Prediction for the lightest CP-even MSSM Higgs-Boson Mass 15m
        We report on the currently highest precision calculation of the lightest Higgs boson mass, Mh, in the MSSM. We combine the Feynman-diagrammatic method (which gives the highest precision for low and medium mass SUSY mass scales) with an RGE resummation (which gives large contributions at high SUSY mass scales). The results are publicly available in the code FeynHiggs. We discuss the phenomenological implications of the new high-precision mass calculation.
        Speaker: Dr. Sven Heinemeyer (IFCA (CSIC))
        Slides
      • 12:30
        Interference effects of neutral Higgs bosons in the MSSM 15m
        The interpretation of the Higgs signal within the MSSM requires precise theoretical predictions including mixing and higher-order effects. In case of nearby resonances in the Higgs sector, interference effects may be relevant. However, the interference term is neglected by the standard narrow-width approximation (NWA), which is in other respects a convenient tool for the factorisation of a more complicated process into production and subsequent decay of a particle with a small width compared to its mass. Hence, a generalisation of the usual NWA is analysed which allows for a consistent treatment of interference effects between nearly mass-degenerate particles. This can be useful for the application to processes for which the factorisation into different sub-processes is essential to enable the computation of higher-order contributions. Phenomenological consequences of interference effects between neutral MSSM Higgs bosons will be presented for an example process of Higgs boson production and its subsequent decay including one-loop corrections. To validate the generalised NWA, the factorised version will be compared to the calculation of the complete process at the one-loop level. Furthermore, full Higgs propagator mixing will be examined in comparison to the Breit-Wigner approximation.
        Speaker: Ms. Elina Fuchs (DESY)
        Slides
      • 12:45
        Searches for invisible decay modes of the Higgs boson with the CMS detector 15m
        A search for Higgs boson invisible decay modes has been carried out in events where the Higgs boson is produced in association with a Z boson as well as through Vector Boson Fusion. In the associated production search, electron, muon and b-quark pair decay modes of the Z-boson are considered. The analyses are based on pp collision data collected with the CMS detector at the LHC collider at centre-of-mass energies of 7 and 8 TeV, corresponding to integrated luminosities of 5/fb and 20/fb, respectively. No evidence of a signal has been found and upper limits on the invisible branching ratio are obtained and interpreted in a Higgs portal model of dark matter interactions.
        Speaker: Dr. Daniele Trocino (Northeastern University (US))
        Slides
      • 13:00
        Search of Higgs to invisible decays with the ATLAS detector 15m
        Searches for decays of the Higgs boson into non detectable invisible particles are presented. Data taken by the ATLAS detector at center of mass energies of 7 and 8 TeV are analysed and in the absence of evidence of such decays, upper limits on the branching ratio to invisible decays are set.
        Speaker: Dr. Stefano Rosati (INFN Sezione di Roma)
        Slides
      • 13:15
        Higgs Phenomenology of the Supersymmetric Grand Unification with the Hosotani Mechanism 15m
        The supersymmetric SU(5) grand unified theory whose gauge symmetry is broken by virtue of the Hosotani mechanism naturally realizes the huge mass splitting between the colored Higgs triplet and the electroweak Higgs doublet superfields, and predicts the existence of adjoint chiral multiplets with masses of the order of the supersymmetry breaking scale as a byproduct. The low-energy Higgs sector is extended to contain an SU(2)_L triplet chiral superfield with hypercharge zero and a neutral singlet as well as the ordinary electroweak Higgs doublets. We investigate the effects from the new triplet and singlet chiral multiplets on the predictions of the couplings of the standard model-like Higgs boson and the masses of the additional Higgs bosons. We show that our model can be differentiated from others through precision measurements of the couplings and masses of the Higgs sector particles. Our model serves as a good example of grand unification testable at colliders such as the luminosity up-graded Large Hadron Collider and future electron-positron colliders.
        Speaker: Mitsuru Kakizaki (University of Toyama)
        Slides
    • 11:30 → 13:30
      Beyond the Standard Model Auditorium 2 ()

      Auditorium 2

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Prof. Sudhir Vempati (Centre for High Energy Physics, Indian Institute of Science, Banglaore India)
      • 11:30
        Triplet extended MSSM: naturality vs LHC data & perturbativity constraints 15m
        In this talk, I will briefly review the triplet extended MSSM, and then show that for a sizable portion of viable parameter space, associated with a large but still perturbative triplet coupling, the model features conspicuously smaller fine-tuning than in the case of MSSM-like couplings. I will then present the results of a fit to Higgs physics data as well as to low energy observables like the B to X_{s\gamma} decay, which demonstrate that the couplings allowed by direct search constraints generally lie well within the experimentally viable regions. Finally, I will show that the goodness of fit of the given experimental data by the triplet extended MSSM is comparable with that of the SM.
        Speaker: Dr. Stefano Di Chiara (University of Helsinki)
        Slides
      • 12:00
        Search for Dark Matter at CMS 15m
        The search for Dark Matter at CMS is presented. Monojet, monophoton, and monolepton final states are all considered, as well as dark matter particles that are produced in association with top quarks. The interpretation of these results as a WIMP are discussed.
        Speaker: Prof. Steven Lowette (Vrije Universiteit Brussel)
        Slides
      • 12:15
        Searches for dark matter with the ATLAS detector 15m
        Different approaches to finding evidence for dark matter at the LHC are presented. These include searches for events with large missing transverse momentum and a single jet, photon or W/Z boson. Different interpretations of the results are presented, including effective field theories and explicit mediator models. Results from sqrt(s) = 8 TeV data taking are presented.
        Speaker: Dr. Ning Zhou (University of California, Irvine)
        Slides
      • 12:30
        Search for heavy resonances decaying to bosons with the ATLAS and CMS detectors 20m
        The search for heavy resonances involving bosons in ATLAS and CMS are presented. These final states include diphoton, VV, VH, and HH resonances.
        Speaker: Dr. Francesco Santanastasio (Sapienza, University of Rome)
        Slides
      • 12:50
        Search for heavy resonances with the ATLAS and CMS detector 20m
        Resonances decaying into a pair of particles are an obvious place to look for phenomena beyond the Standard Model. This talk summarizes recent results on searches for resonances in pairs of jets, leptons, lepton and jet, photon and jet, as well as pairs of photons. Various models are considered such the Z' and W', the Randall-Sundrum warped extra dimensions as excited quarks, quantum black holes, technicolor. Results from sqrt(s) = 8 TeV are presented.
        Speaker: Koji Terashi (University of Tokyo)
        Slides
      • 13:10
        Search for leptoquark signatures with the ATLAS and CMS detectors 20m
        The most recent results on searches for 1st, 2nd, and 3rd generation leptoquarks with the ATLAS and CMS experiment are presented. Alternative interpretations of the searches for R-parity-violating stop squark decays are also presented.
        Speaker: Dr. Francesco Romeo (IHEP of Beijing)
        Slides
    • 11:30 → 13:30
      Flavour Physics Sala 8+9 ()

      Sala 8+9

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Prof. Cai-Dian Lu (IHEP, Beijing)
      • 11:30
        Measurement of the phase of Bs mixing with Bs→φφ 15m
        The Bs meson provides an ideal laboratory for measurements of CP violation and searches for CPV beyond the Standard Model. We present recent LHCb results on measurements of the Bs mixing phase using the penguin mediated decay Bs→φφ, which is very sensitive to physics beyond the Standard Model.
        Speaker: Mr. Matthew Needham Needham (University of Edinburgh)
        Slides
      • 11:45
        $B_{s,d}^0 \to \ell^+\ell^-$ Decays in the Aligned Two-Higgs-Doublet Model 15m
        The rare decays $B_{s,d}^0 \to \ell^+\ell^-$ are analyzed within the general framework of the aligned two-Higgs doublet model. We present a complete one-loop calculation of the relevant short-distance Wilson coefficients, giving a detailed technical summary of our results and comparing them with previous calculations performed in particular limits or approximations. We investigate the impact of various model parameters on the branching ratios and study the phenomenological constraints imposed by present data.
        Speaker: Dr. Jie Lu (IFIC, University of Valencia)
        Slides
      • 12:00
        Measurements of charmless B decays at Belle 15m
        We report measurements of the branching fraction (BF) and CP asymmetry ($A_{CP}$) for three rare charmless decays $B^0 \to \pi^0 \pi^0$, $B^0 \to \eta^0 K^{*}(892)^{0}$ and $B^+ \to \bar{K}^{*}(892)^{0} K^{*}(892)^{+}$. Previous measurements of the BF($B^0 \to \pi^0 \pi^0$) are significantly larger than theoretical expectations. The measured BF and $A_{CP}$ in this mode are vital for the determination of the $CP$-violation parameter $\phi_2$ based on isospin relations in $B\to \pi \pi$ decays. The mode $B^0 \to \eta^0 K^{*}(892)^{0}$ is sensitive to a potentially large flavor-singlet contribution. Previous studies provided evidence for its existence at the $4\sigma$ level. The decay $B^+ \to \bar{K}^{*}(892)^{0} K^{*}(892)^{+}$ proceeds via the $b \to d$ loop diagram and is sensitive to potential new physics contributions. All three measurements employ the full $\Upsilon(4S)$ data set of $711{\rm fb}^{-1}$ available at Belle and will be our final results for these modes. Further increases in sensitivity will provided by the upcoming Belle II experiment.
        Speaker: Dr. Marko Petric (Jozef Stefan Institute)
        Slides
      • 12:15
        Dalitz plot analysis of charmless b-hadron decays 15m
        Charmless b-hadron decays are suppressed in the Standard Model by tiny CKM matrix elements which brings the tree amplitudes to levels comparable with loop amplitudes, and potentially New Physics amplitudes. CP violation measurements using Dalitz plot analyses in multi-body decays allow to disentangle these various contributions. We report about the most recent measurements from LHCb, including observations of new decay modes.
        Speaker: Mr. Stefano Perazzini (INFN e Università di Bologna)
        Slides
      • 12:30
        Probing CP violation in B0s -> K0Spipi decays 15m
        The three-body charmless hadronic decay B0s -> K0SKpi provides a number of novel possibilities to search for CP violation effects and test the Standard Model of particle physics. These include model-dependent and model-independent comparisons of the Dalitz plot distributions of the decay-time-integrated K0SK+pi- and K0SK-pi+ final states, decay-time-dependent (but without initial state flavour tagging) fits to the Dalitz plot distributions, as well as full decay-time-dependent and flavour tagged fits. The relative sensitivities of these different approaches are investigated.
        Speaker: Mr. Rafael Silva Coutinho (University of Warwick)
        Slides
      • 12:45
        Time-dependent CP violation measurements in $B$ decays from the Belle experiment 15m
        We present the results of the time-dependent measurements of CP-violating parameters in $B^0$ decays to the final states $\omega K_S^0$ and $\eta' K^0$. The results are obtained using the full statistics collected by the Belle experiment on $e^+ e^-$ asymmetric-energy collider KEKB, which corresponds to 772 million $B\bar{B}$ events.
        Speaker: Veronika Chobanova (MPI)
        Slides
      • 13:00
        Study of CP violation effects in the charmless hadronic decay B -> Ks pi+ pi0 15m
        We report a Dalitz plot analysis of the charmless hadronic decays of charged B mesons to the final state Ks pi+ pi0 using the full BABAR dataset of 471 million BBbar events collected at the Upsilon(4S) resonance. We observe an excess of signal events and measure the branching fractions and CP asymmetries, for the different resonant decay modes and inclusively.
        Speaker: Dr. Nicolas Arnaud (LAL (CNRS/IN2P3 and Université Paris Sud))
        Transparents
      • 13:15
        Branching fractions and CP violation in charmless 3-body decays of B mesons 15m
        Branching fractions and CP-violating asymmetries of charmless three-body decays of B_{u,d} and B_s mesons are studied using a simple model based on the factorization approach. We consider both resonant and nonresonant contributions. Dominant nonresonant contributions to tree-dominated three-body decays can be evaluated using heavy meson chiral perturbation theory valid in the soft meson limit. For penguin-dominated decays, nonresonant signals come mainly from the penguin amplitude governed by the matrix elements of scalar densities. Inclusive and regional CP asymmetries are predicted and confronted with the LHCb data. For B_s decays, several model-independent U-spin symmetry relations for CP violation are derived.
        Speaker: Prof. Hai-Yang Cheng (Academia Sinica)
        Slides
    • 11:30 → 13:30
      Heavy Ions Sala 6+7 ()

      Sala 6+7

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Dr. Elena Gonzalez Ferreiro (Universidade de Santiago de Compostela)
      • 11:30
        PHENIX Results on Heavy Flavor Physics 20m
        The PHENIX experiment at the Relativistic Heavy Ion Collider has measured a suite of observables for open and closed heavy flavor in a variety of collision systems, p+p, d+Au, Cu+Cu, Au+Au, U+U, and at different beam energies. These results indicate substantial modification in the yields of quarkonia, including J/Psi, Psi', and Upsilon states, and a substantial redistribution in momentum space of open heavy flavor quarks. We present the latest results and comparisons to competing theoretical interpretations.
        Speaker: Dr. Richard Hollis (University of California, Riverside)
        Slides
      • 11:50
        Heavy Flavor measurements at STAR 20m
        In ultrarelativistic heavy ion collisions, a phase transition occurs from hadronic matter into a state of deconfined quarks and gluons. Properties of this new state of matter, dubbed as the strongly interacting Quark-Gluon Plasma (sQGP), have been a subject of extensive measurements at the Relativistic Heavy Ion Collider (RHIC) in the past decade. Due to their large masses, charm and bottom quarks are dominantly produced in hard QCD processes early in the collisions and thus provide a unique means of exploring the properties of the sQGP. Open heavy flavor production is sensitive to interactions with the medium, while the production of different quarkonium states probe the thermal properties of the sQGP. Other effects, such as initial state cold nuclear matter effects, production via recombination of quark-antiquark pairs in the sQGP, and dissociation in hadronic phase, could also alter the expected picture. Measurements of the open heavy flavor and quarkonium production in different collision systems and at different energies are therefore crucial for disentangling relative contributions from these effects. In this talk we report recent STAR heavy flavor results at $\sqrt{s_{NN}}$=200 GeV in p+p and d+Au collisions, $\sqrt{s_{NN}}$=200 GeV, 62.4 and 39 GeV in Au+Au collisions, as well as $\sqrt{s_{NN}}$=193 GeV in U+U collisions. The latter provides the highest energy density at RHIC. Measurements of open heavy flavor hadrons through both hadronic and semi-leptonic channels, and those of $J/\psi$ and $\upsilon$ states will be presented and compared to theoretical calculations. The future prospect of the heavy flavor program at STAR in light of recent detector upgrades will also be discussed.
        Speaker: Dr. Robert Vertesi
        Slides
      • 12:10
        Nuclear Matter effects on Quarkonia and Heavy-Quarks 20m
        The last pPb run at 5 TeV which took place at CERN LHC provides measurements of the Nuclear Matter (NM) effects at an unprecedented energy, especially for the heavy quark and quarkonium sectors. The comparison of the experimental results to the phenomenological inputs is therefore essential, both to put stringent constrains of their main features and to envision the next most discriminating measurements. We study the NM effects on J/psi [1], Upsilon [2] and open beauty [3] production. We consider an exact 2 to 2 kinematics (as expected from LO pQCD) for the bulk of the heavy-quark and quarkonium [4] production process. We show that the evaluation of the J/psi nuclear modification factor R_pPb suffers from large factorisation scale uncertainties, on top of the already large uncertainties due to the current knowledge of the nuclear modifications (shadowing, EMC effects, ...) of the parton distribution. Such scale uncertainties are reduced for the Upsilon case, owing to the larger mass and hence the larger scale of the production process. Also, we advocate that the nuclear absorption of the pre-resonant b-bbar pair should be negligible at LHC energies. We finally emphasize the complementarity between the studies of open heavy flavour and quarkonium production in pA collisions. Indeed, there is no debate that the heavy quark propagates as a colored object in the nuclear matter. On the contrary, for the quarkonia, there is neither a consensus on the impact of the possible break-up of the heavy quark pair in the matter nor on whether the pair propagates in a color singlet or octet state and is thus subject to a fractional energy loss, recently revived in the literature [5]. References [1] E. G. Ferreiro, F. Fleuret, J. P. Lansberg and A. Rakotozafindrabe, Phys. Rev. C 88 (2013) 047901. [2] E. G. Ferreiro, F. Fleuret, J. P. Lansberg, N. Matagne and A. Rakotozafindrabe, Eur. Phys. J. C 73 (2013) 2427. [3] Z. Conesa del Valle, E. G. Ferreiro, F. Fleuret, J. P. Lansberg and A. Rakotozafindrabe, arXiv:1402.1747. [4] E. G. Ferreiro, F. Fleuret, J. P. Lansberg and A. Rakotozafindrabe, Phys. Lett. B 680 (2009) 50. [5] F. Arleo, S. Peigne, T. Sami, Phys. Rev. D83 (2011) 114036.
        Speaker: Dr. Andry Rakotozafindrabe (CEA Saclay, IRFU, France)
        Slides
      • 12:30
        Heavy-quark and quarkonia probes of the QGP at the LHC with the ALICE detector 20m
        The experimental laboratory to create and study strongly interacting matter under extreme conditions of temperature and energy density are ultra-relativistic heavy-ion collisions. A transition of hadronic matter to a Quark Gluon Plasma (QGP) phase is predicted by lattice Quantum ChromoDynamics for high enough temperatures. Heavy quarks (charm and beauty) and quarkonia are produced in the early stages of the interaction and probe the entire medium evolution. Their production has been measured in heavy-ion collisions at the LHC with the ALICE detector. Open heavy-flavour production is affected by heavy-quark in-medium energy loss. Heavy-flavour hadron spectra are modified in the most central Pb--Pb collisions at a centre-of-mass energy $\sqrt{s_{NN}}=2.76$ TeV per nucleon--nucleon pair, with respect to those of pp collisions at the same energy. The second harmonic of the azimuthal distribution Fourier decomposition, $v_2$, of heavy-flavour hadrons is positive for non-central collisions at intermediate transverse momentum, suggesting that heavy quarks take part in the system collective motion. A small fraction of heavy quarks ends up forming quarkonia ($J/\psi$, $\psi^{\prime}$, $\Upsilon$). The inclusive $p_{\rm T}$-integrated $\Jpsi$ yield is suppressed in the most central Pb--Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV, with respect to that of pp collisions at the same energy. The comparison of these results with the measurements performed at RHIC energies, suggests that mechanisms for both breaking-up or recombining the heavy-quark bound states are at play at the LHC. The measurements of heavy-flavour hadrons in p--Pb collisions at $\sqrt{s_{NN}}=5.02$ TeV demonstrate that the medium modifications observed in Pb-Pb collisions are not dominated by effects due to the presence of cold nuclear matter but have to be attributed to genuine effects due to the formation of a hot and dense QGP phase. Heavy-flavour hadron measurements with the ALICE detector will be presented. The results in Pb--Pb and p--Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV and 5.02 TeV, respectively, will be discussed.
        Speaker: Zaida Conesa del Valle (IPN Orsay (CNRS/IN2P3 - Université Paris-Sud))
        Slides
      • 12:50
        Heavy-quark and quarkonia probes of the QGP in CMS 20m
        Quarkonia are especially relevant for studying the quark-gluon plasma since they are produced at early times of the collision and propagate through the medium, mapping its evolution. This talk presents measurements of quarkonia in pp and PbPb collisions at 2.76 TeV and in pPb collisions at 5.02 TeV.
        Speaker: Dr. Lamia Benhabib (CERN, Switzerland)
        Slides
      • 13:10
        Hessian PDF reweighting meets the Bayesian methods 20m
        We discuss the Hessian PDF reweighting - a technique intended to estimate the effects that new measurements have on a set of PDFs. The method stems straightforwardly from considering new data in a usual χ2 fit and it naturally incorporates also non-zero values for the tolerance, Δχ2>1. In comparison to the contemporary Bayesian reweighting techniques, there is no need to generate large ensembles of PDF Monte-Carlo replicas, and the observables need to be evaluated only with the central and the error sets of the original PDFs. In spite of the apparently rather different methodologies, we show that the Hessian and the Bayesian techniques are actually one and the same, but only if the Δχ2 criterion is properly included to the Bayesian likelihood function that is a simple exponential. We illustrate the situation by considering a simplified example and the case of inclusive jets at the LHC. We also apply the method to proton-lead and heavy ion (lead-lead) collisions to explore their constraining power on nuclear parton distributions.
        Speaker: Dr. Maria Zurita (University of Santiago de Compostela)
        Slides
    • 11:30 → 13:35
      Lepton Flavour Violation Sala 2 ()

      Sala 2

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Oscar Vives (IFIC)
      • 11:30
        Flavour violating lepton decays in supersymmetric low-scale seesaws 20m
        In previous works (JHEP03(2012)100, JHEP09(2012)015), we have highlighted that the Higgs and Z-mediated penguin diagrams contributing to lepton flavour violating (LFV) observables like tau->3mu are strongly enhanced in the supersymmetric inverse seesaw model. It has recently been pointed out that an error in the literature for the Z-penguins form factors would lead to a non-physical non-decoupling behaviour (1312.5318). This work is devoted to the study of LFV lepton decays and mu-e conversion in the supersymmetric inverse seesaw, taking all contributions into account with the corrected form factors. We explicitly distinguish various regimes depending on the dominant contribution and give predictions for various observables, some of them already within reach of the current experiments.
        Speaker: Dr. Cedric Weiland (Universidad Autonoma de Madrid)
        Slides
      • 11:50
        Radiatively-induced LFV Higgs decays from massive ISS neutrinos 20m
        In the inverse seesaw, the smallness of the neutrino masses is related to the smallness of a lepton number violating mass term whilst the seesaw scale is naturally close to the TeV. This allows for large effects in lepton flavor and universality violating observables as was previously demonstrated. With the ongoing and planned measurements of the Higgs boson properties at the LHC, we found timely to investigate the possibility of having large lepton flavor violating branching ratios in Higgs decays within the context of SUSY and non-SUSY extensions of the SM. In this presentation, we will discuss our results on the lepton flavor violating Higgs decay rates, comparing the SUSY and non-SUSY contributions induced radiatively by massive ISS neutrinos.
        Speaker: Dr. Ernesto Arganda (Departamento de Física Teórica, Universidad de Zaragoza)
        Slides
      • 12:10
        The Zee Babu model revisited in the light of new data 20m
        We update previous analyses of the Zee-Babu model in the light of new neutrino and LFV data, and the LHC results. We also analyse the possibility of accommodating the deviations in Higgs the diphoton channel hinted by the LHC experiments, and the stability of the scalar potential. We find that neutrino oscillation data and low energy constraints are still compatible with masses of the extra charged scalars accessible to LHC. Moreover, if any of them is discovered, the model can be falsied by combining the information on the singly and doubly charged scalar decay modes with neutrino data. Conversely, if the neutrino spectrum is found to be inverted and the CP phase is quite different from , the masses of the charged scalars will be well outside the LHC reach.
        Speaker: Juan Herrero (Universidad de Valencia-IFIC, CSIC)
        Slides
      • 12:30
        Disentangling new physics contributions in lepton flavour violating tau decays 20m
        Within an effective field theory framework, I will discuss the possibility to discriminate between different operators that contribute to lepton flavour violating tau decays. Correlations among decay rates in different channels as well as differential distributions in many-body decays are considered. Recent developments in the determination of the hadronic form factors for tau -> mu pi pi decays are incorporated in the analysis.
        Speaker: Alejandro Celis (IFIC-Universitat de Valencia)
        Slides
      • 12:50
        LFV in SUSY seesaws after theta_13, MEG13 and LHC13 20m
        A general overview of the connection between radiative LFV decays, neutrino and LHC data in the context of SUSY seesaws will be given. The impact of the measurement of the reactor neutrino mixing angle and the most recent bounds on rare LFV decays will be discussed.
        Speaker: Filipe Joaquim (CFTP, IST)
        Slides
      • 13:10
        Precision tests of the Standard Model with kaon decays at CERN 25m
        Recent results and prospects for precision tests of the Standard Model in kaon decay in flight experiments at CERN are presented. A measurement of the ratio of leptonic decay rates of the charged kaon at a 0.4% precision constrains the parameter space of new physics models with extended Higgs sector, a fourth generation of quarks and leptons or sterile neutrinos. Searches for heavy neutrino mass states and the dark photon in the ~100 MeV/c$^2$ mass range based on samples collected in 2003-2007 are in progress and prospects will be discussed. The NA62 experiment starting in 2014 will search for a range of lepton number and lepton flavour violating decays of the charged kaon and the neutral pion at improved sensitivities down to ~$10^{-12}$, which will probe new physics scenarios involving heavy Majorana neutrinos or R-parity violating SUSY.
        Speaker: Dr. Gianluca Lamanna (INFN Pisa)
        Slides
    • 11:30 → 13:39
      Neutrino Physics: Neutrino Mass, and Neutrinos from the Cosmos and at Colliders Auditorium 3B ()

      Auditorium 3B

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Prof. Amol Dighe (Tata Institute of Fundamental Research)
      • 11:30
        The KATRIN Neutrino Mass Experiment 13m
        The Karlsruhe Tritium Neutrino (KATRIN) Experiment aims to measure the neutrino mass using tritium beta decays. KATRIN will carefully determine the shape of the tritium beta-decay spectrum near the endpoint. After collecting three years of data, KATRIN will be able to discover a neutrino mass as small as 350~meV (5$\sigma$), or place an upper limit at 200~meV (90\% CL). The experiment is currently under construction and commissioning at the Karlsruhe Institute of Technology. The main components of the experiment include a windowless, gaseous tritium source, differential and cryogenic pumping to remove the tritium gas, two spectrometers, and a silicon PIN diode detector. The tritium source and pumping sections are currently under construction. KATRIN's spectrometers act as precision high-pass energy filters, using the technique of magnetic adiabatic collimation with an electrostatic retarding potential to precisely remove low-energy electrons. The main spectrometer and the silicon detector are undergoing extensive testing to allow us to fully understand the electron transmission properties. This talk will present the current status of KATRIN construction and commissioning activities.
        Speaker: Dr. Noah Oblath (Massachusetts Institute of Technology)
        Slides
      • 11:45
        Neutrino mass experiments with Ho 13m
        Neutrino oscillation experiments have proven that neutrinos are massive particles, nevertheless the assessment of their absolute mass scale is still an outstanding challenge in today particle physics and cosmology. The experiments dedicated to effective electron-neutrino mass determination are the ones based on the study of nuclear processes involving neutrino, like single beta decay and electron capture decay. The end-poin measurement of 163Ho EC is an appealing alternative respect to the single beta decay because fewer nuclei are needed and it is a self-calibrating measurement. Although the calorimetric measurement of the energy released in the EC decay of 163Ho was proposed in 1982 by A. Rujula and M. Lusignoli, only recent detector technological progresses have allowed to design a sensitive experiment. Nowadays the two experiments dedicated to this delicate measurement are ECHO and HOLMES. This contribution gives an outlook for both experiments underling their technical challenges and perspectives.
        Speaker: Dr. Elena Ferri (Uiversità Milano-Bicocca)
        Slides
      • 12:00
        Borexino: recent solar and terrestrial neutrino results 15m
        The first phase of the Borexino experiment, currently running at the Laboratori del Gran Sasso in Italy, has been completed in 2010, and after a successful purification campaign which have further brought down the background levels, a second data taking phase is now in progress, started in October 2011. In this talk the, after recalling the main features of the detector, the final results of Phase I will be summarized, as well as the first outcomes of Phase II, namely: a new measurement of the geoneutrino flux, the detection of the imprinting of the annual modulation in the solar neutrino signal, the full understanding of the cosmogenic backgrounds and very recent limits on heavy sterile neutrino mixing in 8B decay. Moreover, the full perspectives for solar neutrinos with the whole amount of data planned to be taken in Phase II will be given, emphasizing the unique possibility of Borexino to cover at the end of its program the entire solar neutrino spectrum, .including the two important and challenging still missing pieces represented by pp and CNO neutrinos.
        Speaker: Sandra Zavatarelli (INFN - Genova)
        Slides
      • 12:15
        Supernovae Neutrinos: Oscillation and Phenomenology. 13m
        Supernovae (SN) are one of the highest energetic astrophysical events. Almost all the enormous energy (10^(53) ergs) released during such an event is emitted in terms of neutrinos. These neutrinos while free streaming out of the SN will undergo flavor oscillations. Apart from the usual MSW oscillations the SN neutrinos will have nonlinear flavor evolution due to neutrino-neutrino interactions. These oscillations can generate unique signatures under different oscillation scenarios. Thus opening the possibility of rich phenomenology in the earth based neutrino detectors for a future galactic SN burst. Moreover, the absence of such a galactic event in near future will increase the importance of detecting the diffuse background of neutrinos from all past supernovae. Detection of such a relic background of SN neutrinos will push the frontier of astrophysical neutrinos to cosmic distances.
        Speaker: Dr. Sovan Chakraborty (Max plank for Physics)
        Slides
      • 12:30
        Core-Collapse Supernova Neutrino Detection 13m
        This talk will briefly survey the capabilities of current detectors sensitive to supernova neutrino bursts. It will then cover recent progess in development of supernova neutrino detection techniques as well as prospects for specific future experiments.
        Speaker: Dr. Alexander Himmel (Duke University)
        Slides
      • 12:45
        Underground Physics with LBNE 13m
        The Long-Baseline Neutrino Experiment plans a 34-kton (fiducial mass) liquid argon time projection chamber to be sited at 4850 ft depth at the Sanford Underground Research Facility in South Dakota. The significant overburden at this site gives LBNE significant physics reach for several non-beam physics topics. These include neutrino oscillation studies with atmospheric neutrinos, for which the LAr TPC enables precision reconstruction, baryon number violation searches, for which detection of kaon modes has particularly high efficiency, and detection of neutrino bursts from core-collapse supernovae, for which the electron-neutrino flavor sensitivity will be unprecedented. This talk will discuss the unique underground physics capabilities of LBNE.
        Speaker: Prof. Giles Barr (Oxford University)
        Slides
      • 13:00
        Heavy neutrino hunting in Higgs- and Z decays at high luminosity Higgs and Z factory. 13m
        With the discovery of the Higgs H(126) boson at the LHC, the Standard Model of particle physics is still lacking an understanding of the generation and nature of neutrino masses. Dirac mass term? Majorana mass term? The favorite theoretical scenario is that both mass terms are present, leading to the existence of heavy partners of the light neutrinos, presumably more massive and nearly sterile. For suitable choices of parameters the heavy neutrinos can serve as good candidates for dark matter, and generate the baryon asymmetry of the universe. These heavy neutrinos can be searched for at high energy lepton colliders of very high luminosity, such as the Future e+e- Circular Collider, FCC-ee, presently studied within Future Circular Collider study at CERN as a possible first step. A first look at sensitivities both from neutrino counting and and from search for heavy neutrino decay will be presented.
        Speaker: Alain Blondel (UNIGE)
        Slides
      • 13:13
        Minimal SO(10) unification at two loops 13m
        I will review the current status of the minimal SO(10) GUT and comment on the new results of a dedicated two-loop analysis and their phenomenological implications, focusing, in particular, on the complementarity of the constraints from the LHC physics and those from the future proton decay searches.
        Speaker: Dr. Michal Malinsky (Charles University in Prague)
        Slides
    • 11:30 → 13:50
      Top-quark and ElectroWeak Physics: Top mass Sala 1

      Sala 1

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Conveners: Dr. Roberto Chierici (CNRS), Shinya Kanemura (University of Toyama)
      • 11:30
        New Results and Combination of the Top-Quark Mass at CDF 15m
        We present the final combination of the top-quark mass, Mt , performed by the CDF experiment at the Tevatron collider. The combination includes three recently published and two preliminary results from the CDF Run II data collected at 1.96 TeV center of mass collision energy. The analyses use the full Run II samples of 8.7- 9.3 fb-1 of data. The latter measurements are combined with the CDF Run I published results (1998-2001). The combination includes measurements in the tt ̄ → lepton+jets, tt ̄ → dilepton, tt ̄ → all jets and tt ̄ → Emiss+jets final states. The resulting combined measurement of the top-quark mass is Mt = 173.16 ± 0.57 (stat) ± 0.74 (syst) GeV/c2, with a total uncertainty of 0.93 GeV/c2.
        Speaker: Jonathan Lewis (Fermilab)
        Slides
      • 11:45
        Measurement of the top quark mass with the D0 detector 15m
        We report a measurement of the mass of the heaviest known standard model particle, the top quark, performed by the D0 experiment at the Fermilab Tevatron Collider. We present the most precise D0 measurement employing the matrix element technique in the lepton+jet channel. For this measurement the full D0 data set corresponding to an integrated luminosity of 9.7 fb^-1 is used. We also discuss top quark mass measurements in the dilepton and alljets channels and an updated D0 top quark mass combination.
        Speaker: Oleg Brandt (U Heidelberg - KIP)
        Slides
      • 12:00
        Top mass measurements using the ATLAS detector at the LHC 20m
        Measurements of the top-quark mass with the ATLAS detector in proton-proton collisions are presented. Events where top quark pairs are produced are selected and the top mass distribution is derived from the reconstructed top decay products. The top mass is then measured with the template method. All decay modes of the top quark pairs are used (l+jets, the dilepton and the fully hadronic decay channel). The systematics uncertainties associated to these measurements are discussed in detail.
        Speaker: Mr. Kaven Yau Wong (Physikalisches Institut Universitaet Bonn)
        Slides
      • 12:20
        CMS Measurements of the top quark mass, including alternative techniques and differential measurements 20m
        Result of abstract merging: Measurements of the top quark mass are presented using data collected by the CMS experiment in proton-proton collisions at the LHC at centre-of-mass energies of 7 and 8 TeV. Analyses in several decay channels of top quark pair events are employed to determine the top quark mass. The results are combined and compared to the world average. Measurements of the top quark mass employing alternative methods are presented using data collected by the CMS experiment in proton-proton collisions at the LHC in the years 2011 and 2012 at centre-of-mass energies of 7 and 8 TeV. The alternative methods include the use of endpoint distributions as well as the study of possible model dependencies of the top mass measurement on the event kinematics. Measurements of the difference between the masses of top and anti-top quarks are also presented. Furthermore, the top quark mass, and also alpha_s are extracted from the measured top quark pair cross section.
        Speaker: Dr. Rainer Wallny (ETH Zürich, Switzerland)
        Slides
      • 12:40
        New method for precise determination of top quark mass at LHC 15m
        We propose a new method to measure the top quark mass at the LHC. This method requires only lepton energy distribution and is basically independent of the production process of the top quarks. With this method, the MSbar mass of the top quark can be determined. We perform a simulation analysis of the top quark mass reconstruction with ttbar pair production and lepton+jets decay channel at the leading order. Estimated uncertainties in the top mass reconstruction are about 1.5GeV with an integrated luminosity of 100fb^{-1} at root{s}=14TeV. The uncertainties are expected to be improved by including higher-order corrections.
        Speaker: Ms. Sayaka Kawabata (Tohoku University)
        Slides
      • 12:55
        Combined Top Quark Physics Results from ATLAS and CMS 15m
        Combinations of several measurements of top quark physics from ATLAS and CMS are presented and compared with the expectations from theory. This includes measurements of top quark pair and single top production cross sections as well as properties. The world average combination of the top quark mass will also be presented. The treatment of experimental and modelling systematic uncertainties in the combinations and their correlations between experiments will be discussed in detail.
        Speaker: Dr. Maria Aldaya Martin (University of Hamburg, Germany)
        Slides
      • 13:10
        Measurement of the charged and neutral current DY process, forward-backward asymmetry and the determination of the weak mixing angle with the ATLAS detector 20m
        Result of merged abstracts: Charged and neutral current Drell Yan cross sections are sensitive to the parton distribution functions of the proton and electroweak corrections. The measurements of the neutral current DY process in three distinct kinematic regions, i.e. at the Z boson mass peak, below and above, are performed by the ATLAS collaboration using 7 TeV proton-proton collision data. The results are compared to NLO Monte Carlo simulations and to NNLO QCD predictions corrected for NLO EW effects calculated using various parameterizations of the parton distribution functions. A measurement of the forward-backward asymmetry for the neutral current Drell Yan process is presented. The asymmetry is measured using dielectron and dimuon final states with sqrt(s) = 7 TeV data collected by the ATLAS detector. For the dielectron channel, the measurement includes electrons detected in the forward calorimeter which extends the covered phase space to the region less sensitive to the uncertainties of the parton density functions. The forward-backward asymmetry spectra in all channels are found to be consistent with the corresponding Standard Model predictions. The results are then used to extract a measurement of the effective weak mixing angle. The result is compared with the measurements from LEP, SLD, D0, CDF and CMS.
        Speaker: Uta Klein (University of Liverpool)
        Slides
    • 11:35 → 13:35
      Strong Interactions and Hadron Physics: PDF I Sala 3+4 ()

      Sala 3+4

      Allocated time include time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Mr. Sven-Olaf Moch (Univ. Hamburg)
      • 11:35
        Inclusive deep-inelastic scattering at HERA 15m
        Recent results on deep-inelastic scattering at HERA are presented. The H1 and ZEUS experiments each have determined new measurements of the proton longitudinal structure function FL, making use of the HERA data recorded at reduced centre-of-mass energies. The results are in agreement with each other and with predictions derived from QCD fits. The region of high x is explored in a dedicated measurement by the ZEUS collaboration. All HERA inclusive data published up to now by H1 and ZEUS are combined, taking into account the experimental correlations between measurements. As a result, a combined dataset is obtained. It includes measurements of neutral current and charged current cross sections recorded at different centre-of-mass energies, spanning up to six orders of magnitude both in momentum transfer $Q^2$ and in Bjorken-x. The dataset is superior in precision compared to the previous HERA data combination which included a smaller fraction of the total integrated luminosity collected at HERA. Point-to-point uncorrelated uncertainties better than 1% are observed in certain kinematic regions.
        Speaker: Dr. Vladimir Chekelian (MPI for Physics)
        Slides
      • 11:50
        PDF constraints from CMS measurements 15m
        We present recent CMS results related to constrainting parton distribution functions. Results are based in recent jet measurements performed with 2011 data taken at center-of-mass energy of 7 TeV and 2012 data taken at 8 TeV and on associated W+charm production, which probes the strange quark in the proton at leading order. Recent CMS measurements of associated W+charm production and W muon charge asymmetry at 7 TeV are used together with HERA DIS data in a QCD analysis at next-to-leading order. The HERAFitter framework is used. The strange-quark fraction is determined as a function of the scaling variable x. Results are compared to measurements of ATLAS and NOMAD experiments.
        Speaker: Dr. Katerina Lipka (DESY)
        Slides
      • 12:05
        Impact of ATLAS data on parton density functions 15m
        Various measurements provided by the ATLAS collaboration have significant impact on parton density functions. Inclusive production of W and Z bosons have been analysed using an NNLO QCD fit and found to constraint the strange-quark density at medium and low Bjorken-x. The inclusive jet production at different centre-of-mass energies, dijet and trijet production measured by ATLAS are used in an NLO QCD fit and show impact for the gluon and quark densities. Off-resonance Drell Yan production may be used to constrain anti-quark density at high x. The measurements have higher impact when they are used in a common fit, taking into account correlations of the systematic uncertainties and will help to constrain parton density function uncertainties.
        Speaker: Dr. Frank Ellinghaus (Mainz University)
        Slides
      • 12:20
        Nucleon PDF separation with the collider and fixed-target data. 15m
        We consider impact of the recent data obtained by the LHC, Tevatron, and fixed-target experiments on the quark distributions in nucleon with a particular focus on disentangling different quark species. Improved determination of the poorly known strange sea distribution and the sea isospin asymmetry is obtained. The standard candle benchmarks for the Drell-Yan process at the LHC energies are updated.
        Speaker: Dr. Sergey Alekhin (Instite for High Energy Physics (Protvino, Russia))
        Slides
      • 12:35
        HERAPDF fits of the proton parton densities 15m
        New combined H1 and ZEUS data on neutral and charged current inclusive cross sections at HERA from all running periods 1994-2007, are used as the sole input to NLO and NNLO QCD analyses to determine new sets of parton distributions, HERAPDF2.0, with small experimental uncertainties and an estimate of model and parametrisation uncertainties. Charm and jet production data are also included in the fit to improve, in particular, the determination of the gluon density and the strong coupling, \alpha_s. A HERAPDF fit, evolved in leading order (LO) in alpha_s using the DGLAP evolution equations, is also presented. The LO PDF is particularly useful for Monte Carlo event generators based on LO matrix elements plus parton showers.
        Speaker: Katarzyna Wichmann (DESY)
        Slides
      • 12:50
        Updates of PDFs for the 2nd LHC run 15m
        Abstract: In this talk I will present results on continuing updates in PDFs within the MSTW framework due to both theory improvements and the inclusion of new data sets, including most of the up-to-date LHC data. A new set of PDFs is close to being finalised, with no significant changes expected to the PDFs presented here.
        Speaker: Dr. Patrick Motylinski (UCL)
        Slides
      • 13:05
        NNPDF3.0: Next Generation PDFs for LHC Run II 15m
        PDFs have been an essential ingredient for Run I phenomenology, and will be so even more at the upcoming Run II. Many crucial LHC analysis benefit from improved PDFs, from precision Standard Model measurements, like the W mass determination, and Higgs boson characterization to BSM searches. NNPDF3.0 is the new forthcoming PDF release from the NNPDF Collaboration, a major upgrade that accounts for recent progress in experimental constraints, theory calculations and methodological improvements. In this talk I will present in detail the new NNPDF3.0 set, and discuss the improvements in new experimental data such as the HERA-II structure functions, ATLAS and CMS jets, CMS W+charm, ATLAS and CMS Drell-Yan production and top quark production, the improved theory calculations such as approximate NNLO K-factors for jets and electroweak effects for Drell-Yan data, and the brand-new fitting methodology with the C++ rewriting of the code and fitting strategy validated on closure tests. Finally I explore the phenomenological implications of NNPDF3.0 for the LHC Run II
        Speaker: Dr. Juan Rojo (University of Oxford)
        Slides
    • 13:30 → 15:00
      Lunch 1h 30m
    • 15:00 → 17:30
      Astroparticle Physics and Cosmology Auditorium 3A ()

      Auditorium 3A

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Prof. Graciela Gelmini (University of California, Los Angeles (UCLA))
      • 15:00
        The Characterization of the Gamma-Ray Signal from the Central Milky Way: A Compelling Case for Annihilating Dark Matter 20m
        In scenarios where dark matter particles can annihilate to produce standard model, the galactic center of the Milky Way is expected to provide the highest flux from dark matter in the sky. Recently, we have worked on gamma-ray observations from the Fermi-LAT telescope, and have detected a significant extended excess, which is spherically symmetric around the position of the galactic center, and does not trace any known astrophysical emission profile. In this talk, I will summarize the current status of these observations and discuss dark matter and astrophysical interpretations of the data. I will show results which strongly constrain the properties and the possible interpretations of the observed excess. Finally, I will posit upcoming tests which will strongly suggest, or rule out, a dark matter interpretation.
        Speaker: Dr. Tim Linden (University of Chicago)
        Slides
      • 15:20
        Dark Matter Indirect Detection phenomenology: a status assessment 30m
        I present a phenomenological, data-centered and data-driven assessment of the status of indirect searches for particle Dark Matter, and of the main implications for DM model building. Tantalizing hints and stringent constraints seem to continuosly chase each other, as a number of well performing experiments keep delivering their data. This year may be the one in which we finally see the resolution of these dark puzzles, or it may not.
        Speaker: Mr. Marco CIRELLI (IPhT CNRS/CEA Saclay)
        Slides
      • 15:50
        Constraints on dark matter and future observational strategies with gamma-ray space experiments 20m
        Detection of gamma rays and cosmic rays from the annihilation or decay of dark matter particles is a promising method for identifying dark matter, understanding its intrinsic properties, and mapping its distribution in the universe. I will review recent results from the Fermi Gamma-ray Space Telescope and other space-based experiments, and highlight the constraints these currently place on particle dark matter models. I will also discuss the prospects for indirect searches to robustly identify or exclude a dark matter signal using upcoming data and the comparison with LHC searches
        Speaker: Dr. Aldo Morselli (INFN Roma Tor Vergata)
        Slides
      • 16:10
        First Results from the HAWC Gamma-Ray Observatory 20m
        The High Altitude Water Cherenkov (HAWC) Observatory is a TeV gamma-ray detector located at an altitude of 4100 meters on the northern slope of the Sierra Negra volcano in the state of Puebla, Mexico. The detector will consist of 300 water Cherenkov detectors spread on a 22000 square meter area, and is expected to be fully operational by fall this year. Thanks to its large field-of-view, good angular resolution and >90% duty cycle, HAWC will allow us to study the Galactic sources at high energies (100 GeV - 100TeV), diffuse gamma-ray emission, and transient emissions from Active Galactic Nuclei and Gamma-Ray Bursts. The detector started its continuous operation in August 2013 with a fraction of the array, and its size has been increasing since then. In this talk, I will present the first results of the experiment with almost one year of data.
        Speaker: Dr. Francisco Salesa Greus (Pennsylvania State University)
        Slides
      • 16:30
        Overview of MAGIC results 20m
        MAGIC is a system of two 17 m diameter Cherenkov telescopes, located at the Observatorio del Roque de los Muchachos, in the Canary island of La Palma (Spain). MAGIC performs astronomical observations of gamma-ray sources in the energy range between 50 GeV and 10 TeV, and is currently the most sensitive instrument below 100 GeV. The first MAGIC telescope has been operating since 2004, and in 2009 the system was completed with the second one. During 2011 and 2012 the electronics for the readout system were fully upgraded, and the camera of the first telescope replaced. After that, no major hardware interventions are foreseen in the next years, and the experiment has undertaken a final period of steady astronomical observations. MAGIC studies particle acceleration in the most violent cosmic environments, such as active galactic nuclei, gamma-ray bursts, pulsars, supernova remnants or binary systems. In addition, it addresses some fundamental questions of Physics, such as the origin of Galactic cosmic rays and the nature of dark matter. Moreover, by observing the gamma-ray emission from sources at cosmological distances, we measure the intensity and evolution of the extragalactic background radiation, and perform tests of Lorentz Invariance. In this talk I present the status and lastest results of the MAGIC gamma-ray telescopes, with a special emphasis on topics of fundamental physics, astroparticle physics and cosmology.
        Speaker: Dr. Javier Rico (IFAE)
        Slides
      • 16:50
        Recent Highlights from VERITAS 20m
        VERITAS is a ground-based gamma-ray observatory consisting of an array of four atmospheric Cherenkov telescopes located in southern Arizona, USA. VERITAS carries out an extensive observation program of the gamma-ray sky at energies above 0.1 TeV. Observations of Galactic and extragalactic sources in the TeV band are sensitive probes of the highly energetic processes occurring in these objects. Observations by VERITAS of the Galactic center and nearby dwarf spheroidal galaxies provide constraints on particle dark matter with masses above a few hundred GeV. VERITAS observations also provide constraints on fundamental physics and cosmology, such as probing the history of galaxy formation and studying Lorentz-invariance violation. The majority of the sources detected by VERITAS are active galactic nuclei (AGN), with gamma-ray emission originating in their relativistic jets. TeV observations of AGN help us constrain models of particle acceleration and energy dissipation in relativistic jets, and the size and location of the gamma-ray emission region. Galactic sources at TeV energies include supernova remnants, pulsar wind nebulae, and binary systems, and TeV emission is a key diagnostic of the highly energetic particles in these objects. VERITAS observations provide important clues on the origin of cosmic rays and on particle acceleration in supernova blast shocks, and relativistic pulsar wind-termination shocks. In this talk I will present some highlights of particle-astrophysics measurements made with VERITAS.
        Speaker: Prof. Reshmi Mukherjee (Barnard College, Columbia University)
        Slides
      • 17:10
        Physics with the Cherenkov Telescope Array 20m
        The Cherenkov Telescope Array (CTA) is the next generation observatory for ground-based gamma-ray astronomy. Current instruments (HESS, MAGIC and VERITAS) have made huge progress in the observation of cosmic sources of photons in the ~ 50 GeV to ~ 50 TeV energy range using Imaging Atmospheric Cherenkov Telescopes (IACTs). CTA will extend the range of these observations at both low and high energies, will improve their sensitivity by a factor of about 10 and will increase the precision of photon energy and direction measurements. This talk presents briefly the designs of the 23 m, 12 m and 4 m diameter IACTs that CTA will use to achieve this performance, before discussing the impact the array will have on studies of Fundamental and Astroparticle Physics. Topics covered include: searches for Dark Matter (DM) and axion-like particles (ALPs); studies of possible violation of Lorentz invariance; and studies of the sources and acceleration mechanisms of high energy cosmic rays.
        Speaker: Prof. Tim Greenshaw (Liverpool University)
        Slides
    • 15:00 → 17:30
      BEH Physics Auditorium 1 ()

      Auditorium 1

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Prof. James Olsen (Princeton University)
      • 15:00
        Studies of the Higgs boson properties at D0 15m
        We present the combination of searches for the Standard Model Higgs boson at a center-of-mass energy of sqrt(s)=1.96 TeV, using the full Run 2 dataset collected with the D0 detector at the Fermilab Tevatron collider. The major contributing processes include associated production (WH->lvbb, ZH->vvbb, ZH->llbb, and WH->WWW(*)) and gluon fusion (gg->H-->WW(*)). We also present tests of different spin and parity hypotheses for a particle H of mass 125 GeV produced in association with a vector boson and decaying into a pair of b quarks.
        Speaker: Dr. Kenneth Herner (Fermilab)
        Slides
      • 15:15
        Combination of the Higgs Boson Main Properties Measurements using the ATLAS Detector 20m
        The combined measurements of the properties of the Higgs boson using the ATLAS detector and up to 25 fb-1 of 7 TeV and 8 TeV pp collision data collected in 2011 and 2012, are discussed.
        Speaker: Mr. Dag Gillberg (CERN)
        Slides
      • 15:35
        Combined results of the 126 GeV Higgs boson couplings using all decay channels measured by the CMS detector 20m
        The combination of the coupling results of all Higgs boson decay channels measured at CMS is presented. The analysis is based on pp collision data collected at centre-of-mass energies of 7 and 8 TeV corresponding to integrated luminosities of 5/fb and 20/fb respectively. Various fits looking for deviations of the couplings from the Standard Model predictions are carried out and the results are summarized.
        Speaker: Dr. Mingshui Chen (IHEP, CAS)
        Slides
      • 15:55
        Individual and Combined Measurements of the Spin and Parity Properties of the Higgs boson using the ATLAS Detector 15m
        This contribution will review individual and combined measurements of the spin and parity properties in the diphoton, ZZ (with subsequent decays to four leptons) and WW (with subsequent decays to lvlv) channels of the Higgs boson in individual channels using the ATLAS detector and up to 25 fb-1 of 7 TeV and 8 TeV pp collision data collected in 2011 and 2012.
        Speaker: Dr. Kirill Prokofiev (Laboratori Nazionali di Frascati INFN)
        Slides
      • 16:10
        Studies of the Higgs boson spin and parity using the gamma gamma, ZZ, and WW decay channels with the CMS detector 15m
        Studies of the Higgs boson spin and parity are presented using data samples corresponding to the gamma gamma, ZZ, and WW decay channels. The analyses are based on pp collision data collected at centre-of-mass energies of 7 and 8 TeV, corresponding to integrated luminosities of approximately 5/fb and 20/fb, respectively. The data are compared to the expectations for a Standard Model Higgs boson, and for several alternative models.
        Speaker: Dr. Emanuele Di Marco (CERN)
        Slides
      • 16:25
        Constraints on new phenomena through Higgs coupling measurements with the ATLAS detector 15m
        The discovery of the Higgs boson opens many perspectives to explore physics beyond the Standard Model. This talk describes constraints of new physics in a number of models using the combined measurements of the coupling strength of the 125 GeV Higgs particle using the entire ATLAS run-I data. The various models presented include an additional real electroweak singlet, two Higgs doublet models, a simplified Minimal Supersymmetric Standard Model, and a Higgs portal to dark matter.
        Speaker: Swagato Banerjee (University of Wisconsin-Madison)
        SwBanerjee_ICHEP14.pdf
      • 16:40
        Implications of LHC data on 125 GeV Higgs-like boson for the Standard Model and its various extensions 15m
        Recent data on 125 GeV Higgs-like boson at the LHC starts to constrain the electroweak symmetry breaking sector of the SM and its various extensions. If one imposes the local gauge symmetry of the Standard Model (SM) (SU(3)c×SU(2)L×U(1)Y) to the SM and any possible new physics scenarios, the SM Higgs properties will be modified by intrinsically two different ways: by new physics either coupling directly to the SM Higgs boson h, or affecting indirectly the SM Higgs properties through the mixing of h with a SM singlet scalar s. The models of two Higgs doublet, extra sequential and mirror fermions belong to the first category, whereas the models with a hidden sector dark matter, extra vector-like fermions and new charged vector bosons, which can enhance the diphoton rate of the SM Higgs-like resonance, belong to the second category. We perform a global fit to data in terms of the effective Lagrangian description of two interaction eigenstates of scalar bosons, a SM Higgs and a singlet scalar, and their mixing. This framework is more suitable to study singlet-extended scenarios discussed above compared to other approaches based on the Lagrangian of mass eigenstates. With fairly model-independent assumptions, the effective Lagrangian contains at most four free parameters still encompassing the majority of models in the literature. Interestingly, the SM gives the best fit if all data from ATLAS and CMS are used, whereas various singlet extensions can fit better to individual ATLAS or CMS data. Without further assumptions, an upper bound on the total width (or, non-standard branching ratio) is generically obtained. Furthermore, global fit based on our parameterization can be used to probe interactions of the singlet scalar if the singlet resides below 2mW.
        Speaker: Pyungwon Ko (KIAS)
        Slides
      • 16:55
        Effective Higgs Couplings Extraction in the 4 lepton channel at the LHC: surprises and prospects 15m
        Kinematic distributions in Higgs decays to four charged leptons, the so called "golden channel", are a powerful probe of the tensor structure of its couplings to neutral electroweak gauge bosons. We discuss a comprehensive analysis framework designed to perform direct extraction of the all possible Higgs couplings. In this framework we study the sensitivity of the four lepton final state, to higher dimensional loop-induced couplings of the Higgs boson to ZZ, Zγ, and γγ, allowing for general CP mixtures. We present the results of these studies and the impact on handles for studying CP violation in the Higgs sector.
        Speaker: Mr. Yi Chen (Caltech)
        Slides
      • 17:10
        Higgs boson CP-properties in Higgs plus three jet production via gluon fusion at the LHC 15m
        In high energy hadronic collisions, a general CP-violating Higgs boson Φ with accompanying jets can be efficiently produced via gluon fusion, which is mediated by heavy quark loops. We study the dominant sub-channel gg→Φggg of the gluon fusion production process with triple real emission corrections at order α5s. We go beyond the heavy top limit approximation and include the full mass dependence of the top- and bottom-quark contributions. Furthermore, we show within a toy-model scenario that bottom-quark loop contributions in combination with large values of tanβ can modify visibly the differential distributions sensitive to -measurements of the Higgs boson particle.
        Speaker: Dr. Francisco Campanario (IFIC, UV-CSIC)
        Slides
    • 15:00 → 17:35
      Computing and Data Handling Sala 6+7 ()

      Sala 6+7

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Conveners: Prof. Borut Paul Kersevan (Faculty for Mathematics and Physics), Prof. Gang CHEN (Institute of High Energy Physics, CAS)
      • 15:00
        Development of new data acquisition system for COMPASS experiment 15m
        This paper presents development and recent status of the new data acquisiton system of the COMPASS experiment at CERN with up to 50 kHz trigger rate and 36 kB average event size during 10 second period with beam followed by approximately 40 second period without beam. In the original DAQ, the event building is performed by software deployed on switched computer network, moreover the data readout is based on deprecated PCI technology; the new system replaces the event building network with a custom FPGA-based hardware. The custom cards are introduced and advantages of the FPGA technology for DAQ related tasks are discussed. In this paper, we focus on the software part that is mainly responsible for control and monitoring. The most of the system can run as slow control; only readout process has realtime requirements. The design of the software is built on state machines that are implemented using the Qt framework; communication between remote nodes that form the software architecture is based on the DIM library and IPBus technology. Furthermore, PHP and JS languages are used to maintain system configuration; the MySQL database was selected as storage for both configuration of the system and system messages. The system has been design with maximum throughput of 1500 MB/s and large buffering ability used to spread load on readout computers over longer period of time. Great emphasis is put on data latency, data consistency, and even timing checks which are done at each stage of event assembly. System collects results of these checks which together with special data format allows the software to localize origin of problems in data transmission process. A prototype version of the system has already been developed and tested – the new system fulfills all given requirements. It is expected that the full-scale version of the system will be finalized in June 2014 and deployed on September provided that tests with cosmic run succeed.
        Speaker: Mr. Josef NOVY (Czech Technical University in Prage (Czech Rep.))
        Slides
      • 15:15
        The ATLAS Data Acquisition: from Run I to Run II 15m
        The experience gained during the first period of very successful data taking of the ATLAS experiment (Run I) has inspired a number of ideas for improvement of the Data AcQuisition (DAQ) system that are being put in place during the so-called Long Shutdown 1 of the Large Hadron Collider (LHC), in 2013/14. We have updated the data-flow architecture, rewritten an important fraction of the software and replaced hardware, profiting from state of the art technologies. This paper summarizes the main changes that have been applied to the ATLAS DAQ system and highlights the expected performance and functional improvements that will be available for the LHC Run II. Particular emphasis will be put on explaining the reasons for our architectural and technical choices, as well as on the simulation and testing approach used to validate this system.
        Speaker: Dr. Jose Guillermo Panduro Vazquez (Royal Holloway, University of London)
        Slides
      • 15:30
        CMS Alignment and Calibration workflows: lesson learned and future plans 15m
        We review the online and offline workflows designed to align and calibrate the CMS detector. Starting from the gained experience during the first LHC run, we discuss the expected developments for Run II. In particular, we describe the envisioned different stages, from the alignment using cosmic rays data to the detector alignment and calibration using the first proton-proton collisions data ( O(100 pb-1) ) and a larger dataset ( O(1 fb-1) ) to reach the target precision. The automatisation of the workflow and the integration in the online and offline activity (dedicated triggers and datasets, data skims, workflows to compute the calibration and alignment constants) are discussed.
        Speaker: Dr. federico de guio (CERN)
        Slides
      • 15:45
        ATLAS Jet Trigger Performance during Run1 and preparation for Run2 15m
        During the 2011 data-taking run, the Large Hadron Collider (LHC) collided proton beams at the energy of 7 TeV in the centre-of mass, as well as heavy ions at the centre of mass energy of 2.76 TeV. The ATLAS Trigger is designed to reduce the rate of events from the nominal maximum bunch-crossing rate of 20 MHz to approximately 400 Hz, which will then be written on disk offline. The online selection of events containing jets is done using a dedicated jet trigger. The rate from jet events is very high, with a steeply falling spectrum in the distribution of the transverse energy. The jet trigger has been designed to keep an approximately constant jet rate of 0.5 Hz in various transverse momentum intervals and accounts for around 10% of the total trigger rate. During the 2011 data taking the jet trigger at Level 1 was fully efficient for jets with transverse energies above 25 GeV, while full efficiency was reached for energies above 60 GeV for jets identified up to the third trigger level (the Event Filter). The transverse energy resolution of jets reconstructed in the latter region of the spectrum is better than 4%. In this poster, the overall performances of the jet trigger during the 2011 data taking will be summarised, together with important updates used during the 2012 run. In addition, the expected performance of the jet trigger in the LHC Run-II, to start in 2015, will be described.
        Speaker: Dr. sue cheatham (Technion)
        Slides
      • 16:00
        CMS Data preparation for Run II 15m
        The LHC Run II will confront us with new challenges, mainly due to the higher number of interactions per bunch crossing (pileup) and the reduced time distance between bunches. Moreover, the higher energy shifts the interest to complex physics objects such as boosted topologies for jet studies. In order to be ready for the beginning of the run, in view of an early discovery, the CMS Collaboration is currently evolving the infrastructure established during Run I to monitor the data quality, to validate the progresses on detector simulation, event reconstruction, physics object definition, and to handle large scale Monte Carlo samples' production. Beside guaranteeing the readiness for Run II, this infrastructure serves as the basis to test detector upgrade proposals for the High-Luminosity LHC, for which an even higher pileup is expected. This contribution will cover the development and operational aspects of data preparation at CMS for the Run II operations, reporting on how the experience gained in the operations for the Run I is serving the planning of the physics program for Run II.
        Speaker: Dr. Nancy Marinelli (University of Notre Dame, US)
        Paper
        Slides
      • 16:15
        The ATLAS EventIndex: Full chain deployment and first operation 15m
        The Event Index project consists in the development and deployment of a complete catalogue of events for experiments with large amounts of data, such as the ATLAS experiment at the LHC accelerator at CERN. Data to be stored in the EventIndex are produced by all production jobs that run at CERN or the GRID; for every permanent output file a snippet of information, containing the file unique identifier and for each event the relevant attributes is sent to the central catalogue. The estimated insertion rate during LHC Run2 is about 80 Hz of file records containing ~15 kHz of event records. This contribution describes the system design, the initial performance tests of the full data collection and cataloguing chain, and the project evolution towards the full deployment and operation by the end of 2014.
        Speaker: Alvaro Fernandez (IFIC)
        Slides
      • 16:30
        Dataset definition for CMS operations and physics analyses 15m
        Recorded data at the CMS experiment are funnelled into streams, integrated in the HLT menu, and further organised in a hierarchical structure of primary datasets, secondary datasets, and dedicated skims. Datasets are defined according to the final-state particles reconstructed by the high level trigger, the data format and the use case (physics analysis, alignment and calibration, performance studies). During the first LHC run, new workflows have been added to this canonical scheme, to exploit at best the flexibility of the CMS trigger and data acquisition systems. The concept of data parking and data scouting have been introduced to extend the physics reach of CMS, offering the opportunity of defining physics triggers with extremely loose selections (e.g. dijet resonance trigger collecting data at a 1 kHz). In this presentation, we review the evolution of the dataset definition during the first run, and we discuss the plans for the second LHC run.
        Speaker: Dr. Giovanni Franzoni (CERN)
        Slides
      • 16:45
        Rucio, the next-generation Data Management system in ATLAS 15m
        Rucio, the next-generation Data Management system in ATLAS On behalf of the ATLAS Collaboration Rucio is the next-generation of Distributed Data Management (DDM) system benefiting from recent advances in cloud and "Big Data" computing to address HEP experiments scaling requirements. Rucio is an evolution of the ATLAS DDM system Don Quijote 2 (DQ2), which has demonstrated very large scale data management capabilities  with more than 160 petabytes spread worldwide across 130 sites, and accesses from 1,000 active users. However, DQ2 is reaching its limits in terms of scalability, requiring a large number of support staff to operate and being hard to extend with new technologies. Rucio addresses these issues by relying on new technologies to ensure system scalability, cover new user requirements and employ new automation framework to reduce operational overheads.  In this talk,  we will present the history of the DDM project and the experience of data management operation in ATLAS computing. Thus, We will show the key concepts of Rucio, including its data organization. The Rucio design, and the technology it employs, will be then described, specifically looking at its architecture and the various software components it uses. We will show also the performance of the system and will conclude by giving a status of the project and its future evolution.
        Speaker: Dr. Cedric Serfon
        Slides
      • 17:00
        The Software Library of the Belle II Experiment 15m
        The rich physics of heavy quark decays provides creative and precise ways to look into nature. Experimentally, B factories have been producing quite prominent discoveries and new insights: The CP violation in B meson decays, charm neutral meson oscillations, discovery of new particles such as X(3872), and various other significant physics results. Based on these successes, a next generation B factory and the detector counterpart, SuperKEKB and Belle II, are being built in Japan, as the upgrades of KEKB and Belle, respectively. The new factory will start its physics run in the year 2016. This is an ambitious project. The luminosity of the e+ e– collider will be upgraded by the factor of 40, which will create a 50 times larger data set compared to the Belle sample. Both the background and the triggered event rates will be increased by a factor of at least 10. The Belle II software system is designed to accommodate these challenges and to run on grid, cloud, and local resources around the world. Various external software packages are employed to enhance the user interface. The software system, BASF2, is structured as a framework built with dynamic module loading and the ability of parallel processing. The system is written in C++ with Python steering scripts, compatible with common linux operating systems. A full detector simulation library is created based on Geant4. The parallel processing utility is based on a fork-based method, where full events are distributed to the spawned processes. In this talk, we will explain the design of the Belle II software structure with the emphasis on the parallel processing.
        Speaker: Prof. Doris Yangsoo Kim (Soongsil University)
        Slides
      • 17:15
        PanDA: A New Paradigm for Distributed Computing in HEP Through the Lens of ATLAS and other Experiments 15m
        Experiments at the Large Hadron Collider (LHC) face unprecedented computing challenges. Heterogeneous resources are distributed worldwide, thousands of physicists analyzing the data need remote access to hundreds of computing sites, the volume of processed data is beyond the exabyte scale, and data processing requires more than a billion hours of computing usage per year. The PanDA (Production and Distributed Analysis) system was developed to meet the scale and complexity of LHC distributed computing for the ATLAS experiment. In the process, the old batch job paradigm of computing in HEP was discarded in favor of a far more flexible and scalable model. The success of PanDA in ATLAS is leading to widespread adoption and testing by other experiments. PanDA is the first exascale workload management system in HEP, already operating at a million computing jobs per day, and processing over an exabyte of data in 2013. We will describe the design and implementation of PanDA, present data on the performance of PanDA at the LHC, and discuss plans for future evolution of the system to meet new challenges of scale, heterogeneity and increasing user base.
        Speaker: Kaushik De (Univ. of Texas at Arlington)
        Slides
    • 15:00 → 17:30
      Detector RD and Performance Auditorium 2 ()

      Auditorium 2

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Dr. Felix Sefkow (DESY)
      • 15:00
        CMS muon system towards LHC Run 2 and beyond 20m
        The CMS muon system has played a key role for many physics results obtained from the LHC Run 1 data. The LHC will increase the beam energy as well as progressively increase the peak instantaneous luminosity in Run 2 and in the following years. Significant consolidation and upgrade activities are ongoing, in order to improve the CMS muon detectors and trigger performance and robustness. With LHC and then HL-LHC running beyond 2030, the large accumulated radiation dose, the high pileup environment, and the ageing of several detector and electronics components become challenges that can only be met with further development and upgrade work. We will introduce the CMS muon system and present the consolidation work in preparation for LHC Run 2. We will then describe the main constraints and the solutions proposed for the upgrade of the muon detector system towards HL-LHC.
        Speaker: Dr. Luigi Guiducci (Università and INFN Bologna)
        Slides
      • 15:20
        Large-size triple GEM detectors for the CMS forward muon upgrade 15m
        The CMS collaboration considers upgrading the muon forward region which is particularly affected by the high-luminosity conditions at the LHC. The proposal involves Gas Electron Multiplier (GEM) chambers, which are able to handle the extreme particle rates expected in this region along with a high spatial resolution. This allows to combine tracking and triggering capabilities, which will improve the CMS muon High Level Trigger, the muon identification and the track reconstruction. Intense R&D has lead to the development of several GEM prototypes and associated detector electronics which were operated in several test beams. Strip cluster parameters, detection efficiency, and spatial resolution for charged particles are studied with position and high voltage scans and at different inclination angles. A first GEM station is foreseen to be already installed in LHC phase-1 to operate jointly together with the existing CSC detectors in the forward region. The resulting improved pT assignment and lower trigger fake rate will reduce the needed bandwidth and therefore allow to lower the trigger threshold resulting in an increased sensitivity in channels triggering on soft muons, such as H to tau's with subsequent tau -> mu decays. Further GEM detectors are proposed for LHC phase-2 to significantly increase the forward muon acceptance.
        Speaker: Dr. Cesare Calabria (Univ. di Bari e Sez. dell'INFN, Italy)
        Slides
      • 15:35
        The New Small Wheel Upgrade Project of the ATLAS Experiment. 15m
        The instantaneous luminosity of the Large Hadron Collider at CERN will be increased up to a factor of five with respect to the design value by undergoing an extensive upgrade program over the coming decade. Several sub-systems of the ATLAS detector will also be upgraded in order to cope with the higher particle rate and to further improve the excellent performance provided during the first run period. The largest upgrade project for the ATLAS Muon System is the replacement of the present first station in the high-rapidity regions with the so-called New Small Wheels (NSWs), to be installed during the LHC long shutdown in 2018/19. The NSWs consist of eight layers each of Micromegas and small-strip Thin Gap Chambers (sTGC), both providing trigger and tracking capabilities, for a total active surface of more than 2500 m2. It represents the first system with such a large size based on Micro Pattern (Micromegas) and wire detectors (sTGC). We will describe the technological novelties and the expected performance of the NSW system, including the detector design, prototypes construction and test results, the trigger and readout electronics based on a new front-end ASIC (VMM) and the first deployment of a readout architecture based on commercial components. The status of the project and the plan for the completion will also be discussed.
        Speaker: Dr. Bernd Stelzer (SFU Simon Fraser University (CA)
        Slides
      • 15:50
        Upgrade of the ALICE Time Projection Chamber for High-Rate Experiments 20m
        ALICE at the CERN LHC is planning a major upgrade of the central barrel detectors to cope with an increase of the LHC luminosity in Pb-Pb after 2018. The goal is to record Pb-Pb interactions at a rate of 50 kHz after Long Shutdown 2 (LS2), which is a factor of about 100 more than the current data acquisition rate. For the Time Projection Chamber (TPC) this implies replacement of the existing MWPC-based readout chambers by continuously operated Gas Electron Multiplier (GEM) to overcome the rate limitations imposed by the present gated readout scheme. An extensive R&D program has been launched to reach the challenging goals of the upcoming upgrade of the detector and online calibration and data reduction system. As a first step of this program, a prototype of an ALICE Inner Read-Out Chamber (IROC) was equipped with large-size GEM foils as amplification stage to demonstrate the feasibility of this solution. In this presentation the most recent results will be discussed concerning ion backflow suppression, gain stability, energy and dE/dx resolution, stability against discharges. The status of the upgrade of the online calibration and data reduction system, which includes advanced techniques for online corrections of space-charge distortions, as well as the development of a new readout electronics will be also reported.
        Speaker: Dr. Piotr Gasik (TU München)
        Slides
      • 16:10
        Study of a Large Prototype TPC for the ILC using Micro-Pattern Gas Detectors 15m
        In the last decade, R&D of detectors for the future International Linear Collider (ILC) has been performed by the community. The International Large Detector (ILD) is one detector concept at the ILC where calorimetry and tracking systems are combined. The tracking system consists of a Si vertex detector, forward tracking disks and a large volume Time Projection Chamber (TPC). Within the framework of the LCTPC collaboration, a Large Prototype (LP) TPC has been built as a demonstrator. Its endplate is able to contain up to seven identical modules of Micro-Pattern Gas Detectors (MPGD). Recently, the LP has been equipped with resistive anode Micromegas (MM) or Gas Electron Multiplier (GEM) modules. Both the MM and GEM technologies have been studied with a 5 GeV electron beam in a 1 Tesla magnet. After introducing the LP, the current status, recent results (drift velocity, field distortions, ion gate and spatial resolution measurements) as well as future plans of the LCTPC R&D with MM and GEM will be presented.
        Speaker: Dr. Astrid Muennich (DESY)
        Slides
      • 16:25
        High-Rate Capable Floating Strip Micromegas Detector 20m
        We report on the development of novel discharge insensitive floating strip Micromegas (MICRO-MEsh GASeous) detectors, fit for use in high-energy muon spectrometers. The suitability of these detectors for particle tracking is shown in high-background environments and at very high particle fluxes up to 60MHz/cm^2. Measurement and simulation of the microscopic discharge behavior demonstrate the excellent discharge tolerance. A floating strip Micromegas with an active area of 48cm x 50cm with 1920 copper anode strips exhibits in 120GeV pion beams a spatial resolution of 50µm at detection efficiencies above 95%. Pulse height, spatial resolution and detection efficiency are homogeneous over the detector. Reconstruction of particle track inclination in a single detector plane is discussed, optimum angular resolutions below 5° are observed. Systematic deviations of this µTPC-method are fully understood. The reconstruction capabilities for minimum ionizing muons are investigated under intense background irradiation of 550kHz 20MeV protons. An influence on the performance is only observed for temporally and spatially coincident muon and background signals. A 6.4cm x 6.4cm floating strip Micromegas doublet with low material budget is investigated in highly ionizing proton and carbon ion beams at particle rates between 2MHz and 2GHz. Stable operation up to the highest rates is observed, spatial resolution, detection efficiencies, the multi-hit and high-rate capability will be discussed.
        Speaker: Mr. Jonathan Bortfeldt (LMU Munich)
        Slides
      • 16:45
        Time of Flight detectors with SiPMT array readout 20m
        Scintillator based time-of-flight detectors (TOF) may attain good timing performances (eg the MICE TOF detectors and the MEG timing counter with 50 ps time intrinsic resolution), but may have problems for operation inside external magnetic fields. Even fringe fields of a few hundred Gauss may be a problem and complicate magnetic shieldings need to be devised. This is due to the conventional readout with fast photomultipliers. Alternative readout solutions may be based on large-area SiPMT arrays. These devices are insensitive to magnetic fields up to several Teslas, but may have problems due to their intrinsic noise and gain variation with temperature. Systematic tests have been done to study this option both in laboratory with a home-made laser system tuned to simulate the response to cosmic rays and in testbeam with electrons. Available SiPMT arrays from SenSL (ArraySM-4-3035-CER and ArraySB-4-30035-CER, blue extended), Advansid(ASD-SiPM3S-4x4A) and Hamamatsu (S11828-3344 and S12642 with the new TSV technology) have been studied. Results are promising and competitive with conventional solutions with fast PMT readout (Hamamatsu R4998 photomultipliers. as an example). Results on obtained timing resolutions and rate effect dependence will be reported, together with future prospects.
        Speaker: Dr. Maurizio Bonesini (Sezione INFN Milano Bicocca)
        Slides
      • 17:05
        Particle Identification with the Belle II iTOP Detector 20m
        The Imaging Time-of-Propagation (iTOP) Chrenkov ring-imaging detector is a particle identification system designed for use in the barrel region of the Belle II spectrometer. The system detects Cherenkov photons produced by charged particles passing through one of 16 quartz bars arranged in a barrel around the inner tracking detectors. An array of 32 pixelated micro-channel plate photomultipliers (MCP-PMTs) instrument each bar to detect internally reflected photons with time resolution better than 50ps. A waveform sampling ASIC-based frontend readout electronics system digitizes and measures photon detection times. Photon time information is combined with tracker data to reconstruct the charged particle’s Cherenkov ring image for use in particle identification analysis. The ability to distinguish between kaons and pions with high sensitivity will be crucial in many Belle II physics measurements. This presentation will describe the iTOP detector design and application in physics analyses, and summarize current detector development activities and plans leading up to installation in early 2015.
        Speaker: Dr. Brian Kirby (University of Hawaii at Manoa)
        Slides
    • 15:00 → 17:30
      Flavour Physics Sala 8+9 ()

      Sala 8+9

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Prof. Hai-Yang Cheng (Academia Sinica)
      • 15:00
        Measurements of CP violation and mixing in two body charm decays 15m
        LHCb has collected the world's largest sample of charmed hadrons. This sample is used to search for direct and indirect CP violation in charm, and to measure D0 mixing parameters. New updated measurements from several decay modes are presented, with complementary time-dependent and time-integrated analyses. We report on recent measurements of CP asymmetries in D→KK and D→ππ decays using the full LHCb dataset.
        Speaker: Mr. Mark Smith (University of Manchester)
        Slides
      • 15:15
        Charm Mixing and D Dalitz analysis at BESIII 15m
        We measured the asymmetry A_CP of branching ratios of D0—> K-pi+ in the CP-odd and CP-even eigenstates to be (12.7+/1/3+/-0.7)% based on 2.92fb-1 of data accumulated at psi(3770) at BESIII/BEPCII. The A_CP can be used to extract the strong phase difference delta_Kpi between the double Cabbibo-suppressed process D0b —> K-pi+ and the Cabbibo-favored process D0—>K-pi+. Using the world-average values of external parameters, we obtain cos(\delta_{K\pi}) = 1.02+\-0.11+/-0.06+/-0.01.Here, the first and second uncertainties are statistical and systematic, while the third uncertainty arises from the external parameters. This is the most precise measurement of \delta_{K\pi} to date. We perform an analysis of the D+—>KsPi+pi0 Dalitz plot analysis use a data set of 2.92 fb-1 e+e- collisions at psi(3770) mass accumulated by the BESIII Experiment. The Dalitz plot is found to be well-represented by a combination of six quasi-two-body decay channels(Ks rho, Ks rho(1450), K*0bar pi+, K*0(1430)bar pi+, K(1680)bar pi+ and kapa0bar pi+) plus a small non-resonant component. Using the fractions from this analysis, partial branching ratios are updated with higher precision than previous measurements.
        Speaker: Dr. Shengsen Sun (Institute of High Energy Physics)
        Slides
      • 15:30
        $D^0$ and $\bar{D}^0$ mixing and CP violation results from Belle 15m
        We search for CP violation in $D^0$ and $\bar{D}^0$ decays to the $\pi^0 \pi^0$ final state and measure $D^0$-$\bar{D}^0$ mixing in the decays of $D^0 \to K^+ \pi^-$ and $K_S ^0 \pi^+ \pi^-$. The asymmetry obtained in the rate of $D^0$ and $\bar{D}^0$ decays to the $\pi^0 \pi^0$ final state, $[-0.03 \pm 0.64(stat) \pm 0.10(syst)]\%$, is consistent with no CP violation. The mixing parameters are measured to be ${x'}^2 = (0.09 \pm 0.22) \times 10^{-3}$ and $y' = (4.6 \pm3.4) \times 10^{-3}$ for $D^0 \to K^+ \pi^-$, and $x = (0.56 \pm 0.19^{+0.03}_{-0.09}{^{+0.06}_{-0.09}})\%$ and $y = (0.30 \pm 0.15^{+0.04}_{-0.05}{^{+0.03}_{-0.06})}\%$ for $D^0 \to K_S^0 \pi^+ \pi^-$. In $D^0 \to K^+ \pi^-$, the ratio of doubly Cabibbo-suppressed to Cabibbo-favored decay rates $R_D = (3.53 \pm 0.13) \times 10^{-3}$, which excludes the no-mixing hypothesis at the 5.1 standard deviation level. In $D^0 \to K_S^0 \pi^+ \pi^-$, with CP-violation allowed, the parameters $|q/p|=0.90^{+0.16}_{-0.15}{^{+0.05}_{-0.04}}{^{+0.06}_{-0.05}}$ and $\arg(q/p)=(-6 \pm 11{\pm3}{^{+3}_{-4}})^{\circ}$ are found to be consistent with conservation of CP-symmetry in mixing.
        Speaker: Mr. Nisar Nellikunnummel (Tata Institute of Fundamental Research)
        Slides
      • 15:45
        Measurements of CP violation in multibody charm decays 15m
        Charmed hadrons are a unique probe of CP violation with up-type quarks. Yet, CP violation in the charm sector is very suppressed by tiny CKM phases in the Standard Model. Any non-zero measurement would thus be a sign of New Physics. We report on recent measurements of CP asymmetries in multibody charmed meson and baryon decays. The CP asymmetries are studied in regions of the Dalitz space.
        Speaker: Dr. Denis Derkach (University of Oxford)
        Slides
      • 16:00
        D leptonic decay and semi-leptonic decays from BESIII 15m
        Based on 2.92/fb of data accumulated at psi(3770), BESIII measured the branching ratio of (D+ —> mu+ nu) is about (3.71+/-0.19+/-0.06)x 10^{-4}, and determine the weak decay constant f_D=(203.2+/-5.3+/-1.8)MeV. these are the most precise results. Based on the psi(3770) -> DDbar data accumulated at the BESIII experiment, we present studies of D0 -> K- e+ nu and D0 -> pi0 e+ nu decays which include preliminary results of B(D0 -> K- e+ nu) , B(D0 -> pi- e+ nu), as well as the partial decay rates of these decays in q^2 bins. The measured partial decay rates, in return, allow us to determine different parameterizations of the form factors.
        Speaker: Dr. Yangheng Zheng (University of Chinese Academy of Sciences)
        Slides
      • 16:15
        Measurement of the D -> pi- e+ nu partial branching fraction, form factor and implications for Vub. 15m
        Precision measurements of the D -> pi e+ nu form factor could shed new light on the persistent difference between inclusive and exclusive measurements of Vub. We report the measurement of the partial branching fraction of  D -> pi e+ nu in bins of the four-momentum transfer squared of the D to pi system using 347.2 /fb of integrated luminosity of the BaBar data. The D -> pi form factor is extracted with fits to the unfolded partial branching fraction using pole or generalized expansions and the value at zero recoil is determined. These form factors are compared to the current world average, the available lattice predictions, and interpreted with the expectation of a single dominant pole term. The measured form factor is then combined with previous BaBar B -> pi l nu information to determine a value of Vub.
        Speaker: Dr. Arantza Oyanguren (IFIC- Valencia)
        Slides
      • 16:30
        Effect of mixing and CP violation in D decays in the extraction of the angle gamma of the CKM unitarity triangle with B->D(*)K(*) decays. 15m
        The datasets that the LHCb and Belle II experiments are expected to collect in the coming years will allow a sub-degree precision measurement of the angle gamma of the CKM unitarity triangle using Bch->D(*)0K(*) decays. To reach this goal a number of effects that have been neglected so far will require careful evaluation. We discuss these corrections with particular emphasis on the impact of D-Dbar mixing and CPV in charm decays.
        Speaker: Matteo Rama (Istituto Nazionale di Fisica Nucleare - Frascati)
        Slides
      • 16:45
        Dalitz analyses with B→Dh decays 15m
        Decays of b-hadrons to states including open charm provide a rich laboratory to constrain the unitarity matrix and search for new physics. We present recent measurements in this sector, including observations of new decay modes, CP violation and effective lifetime measurements.
        Speaker: Dr. WENBIN QIAN (LAPP-CNRS)
        Slides
      • 17:00
        $B \to D K$ Dalitz plot analyses for $\phi_3$ at Belle 15m
        Dalitz plot analyses of $D \to K_S^0 h h$ ($D = D^0$ or $\bar{D}^0$, $h = K$ or $\pi$) decays following $B \to D^{(*)} K^{(*)}$ decay provide sensitive measurements of CP-violating angle $\phi_3$. We present the first measurement of the CP-violating angle $\phi_3$ using a model-dependent Dalitz plot analysis of $B \to D K$, $D \to K_S^0 K^{\pm} \pi^{\mp}$ decays, and unique model-independent Dalitz plot analysis of $B^0 \to D K^{*}(892)^0$ decays followed by $D \to K_S^0 \pi^+ \pi^-$ and $K^{*}(892)^0 \to K^+ \pi^-$. These measurements use a full data set of $711 fb^{-1}$ collected at the $\Upsilon(4S)$ resonance by the Belle detector at the KEKB collider.
        Speaker: Dr. Yoshiyuki Onuki (University of Tokyo)
        Slides
      • 17:15
        Measurement of the CKM angle γ with Bs→DsK decays 15m
        The angle γ is the least constrained parameter in the CKM unitarity triangle. Its determination in decays induced by tree-level b→c transitions is largely unaffected by potential new physics contributions. This allows for a consistency check of the unitarity triangle, but also of comparisons with γ determinations from modes with loop-diagrams. We present here a new precise determination of γ using a time-dependent flavour-tagged analysis of Bs→DsK decays.
        Speaker: Mrs. Agnieszka Dziurda (The Henryk Niewodniczanski Institute of Nuclear Physics PAS)
        Slides
    • 15:00 → 17:30
      Lattice QCD Sala 2 ()

      Sala 2

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      • 15:00
        Neutral meson mixing on the lattice 30m
        Accurate measurements of K, D and B meson mixing amplitudes provide stringent constraints in the Unitary Triangle analysis, as well as useful bounds on New Physics scales. Lattice QCD provides a non perturbative tool to compute the hadronic matrix elements entering in the effective weak Hamiltonian, with errors at a few percent level and systematic uncertainties under control. In this talk, I will review the recent lattice results for these hadronic matrix elements.
        Speaker: Dr. Nuria Carrasco Vela (INFN-Rome3)
        Slides
      • 15:30
        Precision lattice heavy flavour results from Nf=2+1+1 simulations 20m
        We present precision lattice calculations for the decay constants of the D and B sector as well as determinations of the charm and b quark mass values. Heavy flavour lattice computations are indispensable for SM accuracy tests and may serve as discovery tools for new physics. We use Nf=2+1+1 dynamical quark gauge configurations generated by European Twisted Mass Collaboration. We use data at three values of the lattice spacing with pion masses as low as 210 MeV. Strange and charm quark masses are close to their physical values.
        Speaker: Dr. Petros Dimopoulos (Centro Fermi - Museo Storico della Fisica e Centro Studi e Ricerche "Enrico Fermi" - Dipartimento di Fisica, Univ. di Roma "Tor Vergata")
        Slides
      • 15:50
        CHARMONIA DECAY CONSTANTS FROM LATTICE QCD AND QCD SUM RULES 20m
        We compute the decay constants of the lowest ccbar-states with quantum numbers J(PC)=0(-+) [eta_c], 1(--) [J/psi], and 1(+-) [hc] by using lattice QCD and QCD sum rules. We consider the coupling of J/psi to both the vector and tensor currents. Lattice QCD results are obtained from the unquenched (Nf=2) simulations using twisted mass QCD at four lattice spacings, allowing us to take the continuum limit. On the QCD sum rule side we use the moment sum rules. The results are then used to discuss the rate of eta_c --> gamma gamma decay, and to comment on the factorization in B --> X K decays, with X being either eta_c or J/psi.
        Speaker: Blazenka Melic (Rudjer Boškovic Institute, Theoretical Physics Division P.O.Box 180, HR-10002 Zagreb, Croatia)
        Slides
      • 16:10
        Non-perturbative results for large-N gauge theories 20m
        It has been known for a long time that large-N methods can give invaluable results into non-perturbative phenomena such as confinement. Lattice techniques can be used to compute quantities at large N. In this talk, I will review some recent large-N lattice results and discuss their implications for our understanding of non-perturbative QCD.
        Speaker: Prof. Biagio Lucini (University of Swansea)
        Slides
      • 16:30
        Volume (in-)dependence for SU(N) gauge theories with twisted boundary conditions 20m
        We analyze 2+1 dimensional Yang-Mills theory regularized on a lattice. We employ twisted boundary conditions in the spatial directions and show, using both perturbation theory and non-perturbative simulations, that the physical quantities depend only on the combination NL/b and the magnetic flux given by the twist (N is the number of colors, L the length of the spatial torus and b is the inverse 't Hooft coupling). In this talk we extend the previous analyses to the glueball sector. Finally, extension to 3+1 dimensions and theories with fermions is discussed.
        Speaker: Dr. Mateusz Koren (Instituto de Física Teórica UAM/CSIC)
        Slides
      • 16:50
        Effective Field Theory For QCD-like Theory at TeV scale 20m
        We study the Effective Field Theory of three QCD-like theories: which can be classified by having quarks in a complex, real or pseudo-real representation of gauge group. We wrote their effective field theories in a very similar way so that the calculations can be done using techniques from chiral perturbation theory. We calculated the vacuum-expectation-value, the mass and the decay constant of pseudo-Goldstone Bosons up to next-to-next-to leading order (NNLO) in the first paper. The various channels of general meson-meson scattering of the three cases were systematically studied and calculated up to NNLO in the second paper. In the third paper, we calculated the vector, axial-vector, scalar, pseudo-scalar two-point functions and pseudo-scalar decay constant up NNLO order. We also obtained the analytic S parameter for those different QCD-like theories at the TeV scale. Our results can be used for chiral extrapolation in lattice calculation on strong dynamical theory. It might be also useful for research on the theory about finite baryon density.
        Speaker: Dr. Jie Lu (IFIC, University of Valencia)
        Slides
      • 17:10
        Observables in Higgsed Theories 20m
        The Higgs sector of the standard model, the Higgs and the W/Z bosons, is a quite peculiar theory. Because of the Higgs effect, for some regions of the quantum phase diagram of the theory the observable particles, i.e. gauge-invariant bound states, have the same mass as the elementary particles. This is what makes perturbation theory in the electroweak sector possible. Under which conditions this holds true is not only important for understanding the Higgs sector itself, but may have severe implications for observable states in generic higgsed theories. Herein, the underlying mechanisms are studied with the standard-model Yang-Mills-Higgs sector as an example, using lattice gauge theory. It is shown under which conditions a perturbative description can be expected to give an accurate representation of the observable states. Especially, it is found that only in a rather narrow range of Higgs masses this appears possible, and it is briefly digressed on the connection to the experimental results. In addition, some remarks will be given on the situation in more general theories, which are relevant to the construction of extensions of the standard model.
        Speaker: Dr. Axel Maas (University of Jena)
        Slides
    • 15:00 → 17:30
      Neutrino Physics: Beyond Three-Neutrino Oscillations Auditorium 3B ()

      Auditorium 3B

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Dr. Michel Sorel (IFIC (CSIC - U. Valencia))
      • 15:00
        SOX : Short Distance Neutrino Oscillations with Borexino 15m
        The Borexino detector has convincingly shown its outstanding performances in the in the low energy, sub-MeV regime through its unprecedented accomplishments in the solar and geo neutrinos detection. These performances make it the ideal tool to accomplish a state-of-the-art experiment able to test unambiguously the long-standing issue of the existence of a sterile neutrino, as suggested by the several anomalous results accumulated over the past two decades, i.e. the outputs of the LSND and Miniboone experiments, the results of the source calibration of the two Gallium solar neutrino experiments, and the recently hinted reactor anomaly. The SOX project will exploit two sources, based on Chromium and Cerium, respectively, which deployed under the experiment, in a location foreseen on purpose at the time of the construction of the detector, will emit two intense beams of neutrinos (Cr) and anti-neutrinos (Ce). Interacting in the active volume of the liquid scintillator, each beam would create an unmistakable spatial wave pattern in case of oscillation of the nu-e (or anti nu-e) into the sterile state: such a pattern would be the smoking gun proving the existence of the new sterile member of the neutrino family. Otherwise, its absence will allow setting very stringent limit on its existence. The talk will outline the project and discuss in detail the sensitivity of both Cerium and Chromium measurements.
        Speaker: Dr. David Bravo (Virginia Tech (United States))
        Slides
      • 15:15
        Recent results from the ICARUS experiment 15m
        ICARUS is the largest liquid Argon TPC detector ever built (~600 ton LAr mass). It was smoothly operated underground at the LNGS laboratory in Gran Sasso since summer 2010, up to june 2013, collecting data with the CNGS beam and with cosmics. Liquid argon TPCs are really ``electronic bubble chambers'' providing a completely uniform imaging and calorimetry with unprecedented accuracy on massive volumes. Icarus is internationally considered as a milestone towards the realization of next generation of massive detectors (~tens of ktons) for neutrino and rare event physics. It permits as a unique feature the unambiguous identification of nu_e events. In particular the experimental search for a nu_e signal in the LSND anomaly region in the CNGS beam will be here presented with an updated statistics with respect to the published one. The published result strongly limits the window of opened options for the LSND anomaly, reducing the remaining effect to a narrow region centred around (Dm2 , sin2 (2theta)) = (0.5eV2 , 0.05) where there is an over-all agreement (90% CL) between the present ICARUS limit, the published limits of KARMEN and the published positive signals of LSND and MiniBooNE collaborations. There is tension between our limit and the neutrino lowest energy points of MiniBooNE with 200 < Eν < 475 MeV, suggesting an instrumental or otherwise unexplained nature of the low energy signal reported by MiniBooNE. This relevant parameter region will be fully explored by a proposed dual detector experiment to be performed at a short baseline and low neutrino energies which increase the event rate, reduce the overall multiplicity of the events, enlarge the angular range and therefore substantially improve the nue selection efficiency.
        Speaker: Alessandro Menegolli (Universita di Pavia)
        Slides
      • 15:30
        Short-baseline neutrino physics at Fermilab 15m
        The existing Booster Neutrino Beam (BNB) and the exceptional reconstruction capabilities of the liquid argon TPC detector technology provide an opportunity to execute a world-leading short-baseline neutrino physics program at Fermilab. The MicroBooNE detector, located 470m from the beamline target, is set to begin operation in 2014. The Liquid Argon Near Detector, LAr1-ND, is a proposed new detector to be located 100m from the target. LAr1-ND will provide a detailed characterization of the intrinsic content of the BNB, allowing for a near-to-far extrapolation between the two detectors and enabling precision searches for neutrino oscillations. We will present the capabilities of this program to resolve existing experimental anomalies within neutrino physics or to observe evidence for eV mass-scale sterile neutrinos through neutrino appearance and disappearance channels. The important role this short-baseline program plays in the continued development of the LArTPC technology for long-baseline neutrino experiments in the future will also be described.
        Speaker: Dr. Wesley Ketchum (Los Alamos National Laboratory)
        Slides
      • 15:45
        The NESSiE way for sterile neutrinos 15m
        Neutrino physics is nowadays receiving more and more attention as a possible source of infor- mation for the long–standing problem of new physics beyond the Standard Model. The recent measurement of the third mixing angle θ13 in the standard mixing oscillation scenario encourages us to pursue the still missing results on leptonic CP violation and absolute neutrino masses. However, several puzzling measurements exist, which deserve an exhaustive evaluation. The NESSiE Collaboration has been setup to undertake a definitive experiment to clarify the muon disappearance measurements at small L/E, which will be able to put severe constraints to any model with more than the three-standard neutrinos, or even to robustly measure the presence of a new kind of neutrino oscillation for the first time. To this aim the use of the current FNAL–Booster neutrino beam has been carefully evaluated. The need for at least two sites, Near and Far, carried on an extensive study on their positions, together with the performances of two OPERA–like spectrometers. This proposal is constrained by availability of existing hardware and a time–schedule compatible with the CERN project for a new more performant neutrino beam, which will nicely extend the physics results achievable at the Booster. The experiment to be possibly setup at Booster will allow to clarify the current νμ disappearance tension with νe appearance and disappearance at the eV mass scale. Instead, the new CERN beam will allow a further span in the parameter space together with a refined control of systematics and, more relevant, the measurement of the antineutrino sector, by upgrading the spectrometer with detectors currently under R&D study.
        Speaker: Dr. Luca Stanco (INFN - Padova)
        Slides
      • 16:00
        Neutrinos from STORed Muons, nuSTORM 15m
        Neutrino beams produced from the decay of muons in a racetrack-like decay ring (the so called Neutrino Factory) provide a powerful way to study neutrino oscillation physics and in addition provide unique beams for neutrino interaction studies. The Neutrinos from STORed Muons (nuSTORM) facility is a neutrino factory-like facility designed for short baseline neutrino oscillation and neutrino interaction studies. However, due to the particular nature of nuSTORM, it can also provide an intense, very pure, muon neutrino beam from pion decay which is possibly suitable for long-baseline neutrino oscillation searches as well. This so-called "Neo-conventional" muon neutrino beam from nuSTORM makes nuSTORM a hybrid neutrino factory. In this talk, I will describe the facility and give a detailed description of the neutrino beam fluxes that are available at the facility and the precision to which these fluxes can be determined. I will present sensitivity plots that indicated how well the facility can perform for short-baseline oscillation searches and show its potential for a neutrino interaction physics program. Finally, I will comment on the performance potential of the "Neo-conventional" muon neutrino beam available at the nuSTORM facility.
        Speaker: Dr. Jean-Baptiste Lagrange (Imperial College, London)
        Slides
      • 16:15
        Searching for Sterile Neutrinos and CP Violation: The IsoDAR and Daedalus Experiments 15m
        The IsoDAR experiment uses a novel isotope decay-at-rest (DAR) source of electron antineutrinos using protons from a 60 MeV cyclotron. Paired with a large neutrino detector (such as KamLAND or WATCHMAN), the experiment can observe hundreds of thousands of inverse beta-decay events and do a decisive test of the current hints for sterile neutrino. Daedalus is a phased program leading to a high-sensitivity search for CP violation. The experiment uses a set of high-intensity 800 MeV cyclotrons to produce pion DAR neutrino sources at several locations (1.5km, 8km, and 20km) going to a single ultra-large, underground detector with free protons such as Hyper-K or LENA. The Daedalus experiment will provide a high-statistics antineutrino data set with no matter effects that can be combined with long-baseline data sets to provide enhanced sensitivity to CP violation and matter effects.
        Speaker: Prof. Michael Shaevitz (Columbia University)
        Slides
      • 16:30
        Constraining new physics scenarios in neutrino oscillations 15m
        We consider the disappearance data of the Daya Bay experiment to constrain the parameter space of models where sterile neutrinos can propagate in a large compactified extra dimension (LED) and models where non-standard interactions affect the neutrino production and detection (NSI). I will show that compactification radius R in LED scenarios can be constrained at the level of 0.57μm for normal ordering and of 0.19μm for inverted ordering, at 2σ confidence level. For the NSI model, reactor data put a strong upper bound on the parameter εee at the level of ∼10−3, whereas the main effect of εeμ and εeτ is a worsening of the determination of θ13.
        Speaker: Dr. Davide Meloni (Dipartimento Matematica e Fisica, Universita' di RomaTre)
        Slides
      • 16:45
        The KTY formalism and nonadiabatic contributions to the neutrino oscillation probability 15m
        It is shown that it is possible to obtain the analytical expression for the effective mixing angle in matter using the formalism which was developed by Kimura, Takamura and Yokomakura for the neutrino oscillation probability in matter with constant density. If we assume that the imaginary part of the integral of the difference of the energy eigenvalues of the two levels at each level-crossing is given by the ratio $\gamma$ of the difference of the energy eigenvalues of the two levels to the derivative of the effective mixing angle at the level-crossing, then the nonadiabatic contribution to the oscillation probability can be expressed analytically by this formalism. We give one example in which the energy eigenvalues cannot be expressed as roots of a quadratic equation and we show that our assumption is correct in the approximation of the small mixing angle. (arXiv:1402.5569)
        Speaker: Osamu Yasuda (Tokyo Metropolitan University)
        Slides
      • 17:00
        Neff in low-scale seesaw models versus the lightest neutrino mass 15m
        We evaluate the contribution to effective number of relativistic degrees of freedom of extra sterile states at their decoupling temperatures in Type I seesaw models with two and three extra sterile states as a function of the seesaw and the light neutrino mass.
        Speaker: Ms. Marija Kekic (University of Valencia)
        Slides
      • 17:15
        Constraints on heavy neutrinos and applications 15m
        Several models of neutrino masses predict the existence of neutral heavy leptons. Here, we review current constraints on heavy neutrinos and apply them to inverse and linear seesaw models. We discuss the effect of a fourth heavy neutrino in oscillation experiments
        Speaker: Mr. Francisco Escrihuela (AHEP, University of Valencia)
        Slides
    • 15:00 → 17:30
      Strong Interactions and Hadron Physics: PDF II Sala 3+4 ()

      Sala 3+4

      Allocated time include time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Prof. Stefano Forte (Milan University)
      • 15:00
        Overview of the COMPASS results on the nucleon spin 15m
        The COMPASS experiment at CERN is one of the leading experiments studying the spin structure of the nucleon. These studies are being carried on since 2002, by measuring hadrons produced in deep inelastic scattering (DIS) of polarised muons off different polarised targets (NH3 for polarised protons and 6LiD for polarised deuterons). One of the main goals is to determine how the total longitudinal spin projection of the nucleon, 1/2, is distributed among its constituents, quarks and gluons. We review here the recent results on the quark and gluon helicities obtained by COMPASS, using a longitudinally polarised target. However, the understanding of the nucleon spin structure based only on parton helicities is not in any way complete. Therefore, COMPASS also studies the transverse momentum dependent parton distributions (TMDs) with a transversely polarised target. Concerning the TMDs, the latest results on the Collins and Sivers asymmetries will be shown. The former is sensitive to the transverse spin structure of the nucleon, while the latter reflects the correlations between the quarks transverse momentum and the nucleon spin. This overview will conclude with a summmary of the approved plans of COMPASS for the near future: the study of TMDs with a pioneering polarised Drell-Yan experiment, and the measurement of generalised parton distributions (GPDs).
        Speaker: Dr. Celso Franco (LIP)
        Slides
      • 15:15
        Impact of PDFs at LO, NLO and NNLO with correlated uncertainties between orders using HERAFitter 15m
        We present the HERAFitter project which provides a framework for Quantum Chromodynamics (QCD) analyses related to the proton structure in the context of multi-processes and multi-experiments. Based on the concept of factorisable nature of the cross sections into universal parton distribution functions (PDFs) and process dependent partonic scattering cross sections, HERAFitter allows determination of PDFs from the various hard scattering measurements. Here we report a set of parton distribution functions determined with the HERAFitter program using HERA data and preserving correlations between uncertainties for the LO, NLO and NNLO sets. The sets are used to study uncertainties for ratios of cross sections at LHC calculated at different order in QCD. A reduction of overall theoretical uncertainty is observed in this case.
        Speaker: Prof. Mandy Cooper-Sarkar (Oxford University)
        Slides
      • 15:30
        Charm and beauty structure functions and heavy quark masses at HERA 15m
        The copious production of charm quarks at HERA has yielded a detailed understanding of QCD dynamics, the only measure of the charm contribution to the proton structure, as well as a measurement of the charm mass. Although with smaller samples, measurements of beauty production also place constraints on the structure of the proton and allow a measurement of the beauty quark mass. Several measurements of heavy quark production in deep inelastic scattering, using different decay modes, are presented, both new individual measurements from the H1 and ZEUS collaborations, as well as combined data. These provide a powerful vindication of the form of the gluon density in the proton derived from scaling violations of inclusive deep inelastic scattering data. QCD fits to the data lead to measurements of the charm and beauty masses and also provide precise predictions for e.g. W and Z production at the LHC.
        Speaker: Dr. Misha Lisovyi (DESY Hamburg)
        Slides
      • 15:45
        Charm final states at HERA 15m
        Recent measurements of final states including charm hadrons observed at the HERA collider are presented. The H1 and ZEUS collaborations combined their D* differential cross section measurements and reach precisions as good as 5-10%, whereas the theory uncertainties are much larger. Using the ZEUS experiment, D* production was measured at different centre-of-mass energies. The production of D1 and D*2 mesons were also measured. Charm fragmentation fractions were obtained for various charm hadrons and are found to be compatible with data collected at e+e- colliders. Finally, the production of inelastic J/psi mesons in the hadronic final state is investigated.
        Speaker: Dr. Michel Sauter (ETH Zurich)
        Slides
      • 16:00
        Prompt photon associated with jet photoproduction at HERA in the parton Reggeization approach 15m
        We study the photoproduction of isolated prompt photons associated with jets in the framework of the parton Reggeization approach. The data on pseudorapidity and transverse momentum distributions of the photon and jet, obtained by H1 and ZEUS Collaborations at DESY HERA, are described with the good accuracy, as well, as the data on azimuthal decorrelation variables. The main improvements of the present calculation, with respect to the previous studies in the kT - factorization framework, are the usage of Reggeized quarks formalism, to provide exactly gauge- invariant amplitudes with off-shell initial state quarks, and the first exact treatment of the γR → γg box contribution with off-shell initial state gluons.
        Speaker: Mr. Maxim Nefedov (Samara State University)
        Slides
      • 16:15
        Inclusive diffraction and tests of QCD factorisation at HERA 15m
        Results from diffractive deep-inelastic scattering with a leading proton detected in forward spectrometers are presented. Data from the two experiments H1 and ZEUS, using the FPS and LPS spectrometers, respectively, are combined in a common phase space. New four-differential measurements using the VFPS installed at the H1 experiment are also presented. A QCD factorisation theorem is tested by comparing diffractive jet production data to QCD predictions based on fits to inclusive diffractive cross section data. H1 measured dijet production with a leading proton detected in the VFPS, both in deep-inelastic scattering and in photoproduction. The DIS measurements are complemented by measurements of dijet production with an associated rapidity gap.
        Speaker: Dr. Karel Cerny (Czech Tecnical University Prague)
        Slides
      • 16:30
        Exclusive diffraction at HERA 15m
        The exclusive reaction gamma p -> psi(2S) p has been studied in both deep inelastic electroproduction and in photoproduction with the ZEUS detector in ep collisions at HERA using an integrated luminosity of 350 pb-1. The psi(2S) mesons were identified via their decay chain: psi(2S) -> J/psi pi+ pi- with J/psi -> mu+ mu-. The ratio of the production cross sections R = sigma(psi(2S)) / sigma(J/psi) was measured as a function of the kinematic variables, in particular the photon-proton centre-of-mass energy, W, and compared to predictions of perturbative QCD. The exclusive production of dijets in diffractive deep inelastic lepton-proton scattering has also been measured. Jets have been reconstructed in the photon-Pomeron (gamma*-IP ) centre-of-mass system frame using the exclusive k_T algorithm. The cross section for the exclusive production of dijets is given as a function of the angle between the plane defined by exchanged photon and dijet system and the plane defined by the incoming and scattered lepton momenta in the \gamma*-IP rest frame. It is compared to theoretical predictions of models based on boson-gluon fusion and two-gluon exchange processes. The first measurement of exclusive photoproduction of rho mesons associated with leading neutrons with the H1 detector at HERA is also presented. The data correspond to an integrated luminosity of 1.12 pb-1. The rho meson is identified by its decay pions reconstructed in the central tracking chamber, while the leading neutron carrying a large fraction of the incoming proton momentum, x_L>0.3, is detected in the Forward Neutron Calorimeter. The cross section of the reaction gamma+p -> rho+n+Y, where Y is a small mass system escaping undetected in the proton direction, is measured as a function of the neutron energy, the invariant mass of the pi+ pi- system and p_T^2 of the rho meson. The data are interpreted in terms of two dominant contributions: diffractive proton dissociation channel and elastic production via virtual pion exchange.
        Speaker: Dr. Ewald Paul (physikalisches Insitut bonn)
        Slides
      • 16:45
        Hadronic final states at HERA 15m
        The photoproduction of isolated photons, both inclusive and together with a jet, has been measured with the ZEUS detector at HERA using an integrated luminosity of 374 pb-1. A variety of kinematic variables that are sensitive to different aspects of the event dynamics are studied. Cross sections are given in terms of the collinearity of the photon and the jet, the fraction of the proton energy involved in the interaction, and the pseudorapidity difference between the photon and the jet. These and other variables are also studied for different ranges of x_gamma^{meas}, the fraction of the photon energy involved in the interaction, in order to enhance the direct and resolved photon components of the process. Differential cross sections are also presented for inclusive isolated-photon production as functions of the transverse energy and pseudorapidity of the photon. Higher-order theoretical calculations are compared to the results. Measurements of normalised cross sections for the production of photons and neutrons at very small angles with respect to the proton beam direction in deep inelastic scattering are presented as a function of the Feynman variable xF and of the centre-of-mass energy of the virtual photon-proton system, W. The data are taken with the H1 detector and correspond to an integrated luminosity of 131 pb-1. The measurement is restricted to photons and neutrons in the pseudorapidity range eta > 7.9. To test the Feynman scaling hypothesis the W dependence of the xF dependent cross sections is investigated. Predictions of deep inelastic scattering models and of models for hadronic interactions of high energy cosmic rays are compared to the measured cross sections.
        Speaker: Dr. Peter Bussey (Glasgow University)
        Slides
      • 17:00
        Last results of DIRAC experiment on study hadronic hydrogen-like atoms at PS CERN. 15m
        Results on study the hydrogen-like atoms consisting of charged pions and Kaons are presented. The first measurement of K+π− and K−π+ atoms lifetime was fulfilled basing on identification of 178±49 Kπ pairs from the atom breakup. The measured lifetime is τ=〖2.5〗_(-1.8)^(+3.0) fs . This value is dictated by properties of the strong πK-interaction at low energy, namely S-wave πK scattering length. The first experimental value of the isospin-odd combination of S-wave πK scattering length was obtained |a_0^- |=1/3|a_(1/2)-a_(3/2) |=(〖0.11〗_(-0.04)^(+0.09))M_π^(-1). A dedicated experiment with π+π− atoms allows further study of these already observed atoms. The preliminary results on observation of the long-lived (metastable) states of π+π− atoms are presented. The observation of long-lived states opens the possibility to measure the energy difference between ns and np states – the Lamb shift.
        Speaker: Dr. Afanasyev Leonid (Joint Institute for Nuclear Research (JINR))
        Paper
        Slides
      • 17:15
        Latest LHCf physics results 15m
        The LHCf experiment is composed by two separate detectors, located at +/- 140 m from the ATLAS interaction region of the LHC accelerator. The main goal of the experiment is the measurement of the neutral particles production in the very high pseudo-rapidity region (η > 8.4) both in proton-proton and proton-ion collisions. These measurements are extremely useful to calibrate the hadronic interaction models currently used for the study of the development of very high energy cosmic ray's induced showers in the atmosphere. This talk will describe the latest LHCf physics results both for p-p and p-Pb collisions. In particular, the neutron inclusive spectra in p-p collisions and the neutral pion transverse momentum spectra in p-Pb collisions for different pseudo rapidity regions will be presented.
        Speaker: Prof. Oscar Adriani (University of Florence and INFN Firenze)
        Slides
    • 15:00 → 17:30
      Top-quark and ElectroWeak Physics: Single boson Sala 1 ()

      Sala 1

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Conveners: Dr. Maria Jose Costa (IFIC), Shinya Kanemura (University of Toyama)
      • 15:00
        Elastic Z0 production at HERA 15m
        A search for events ep-> ep Z0 has been performed in ep collisions at HERA using the ZEUS detector. The search is based on the entire HERA-I and HERA-II data set, amounting to 0.49 fb-1 of integrated luminosity. The Z0 was searched in the di-jet decay mode with elastic condition defined by etamax < 3, where etamax is defined as the pseudorapidity of the energy deposit in the calorimeter closest to the proton beam direction. A di-jet mass peak is observed at the Z0 mass and the number of signal events is extracted from a fit to the mass spectrum. The elastic Z0 production cross section is determined and compared to the SM prediction.
        Speaker: Dr. Luca Stanco (INFN - Padova)
        Slides
      • 15:15
        Measurements of the 7 and 8 TeV cross sections for Z->4l  in pp collisions with the ATLAS detector 15m
        A measurement of the cross section for 4 lepton production near the Z resonance is presented for sqrt(s) = 7 and 8 TeV proton-proton collisions recorded with the ATLAS experiment. The measurement is interpreted as a determination of the branching fraction for the Z boson decaying into 4 leptons and is found consistent with the expectation from the Standard Model.  This result provides an important benchmark for the H->4l process.
        Speaker: Dr. Yusheng Wu (University of Michigan; Institute Of Physics, Academia Sinica)
        Slides
      • 15:30
        Study of the W/Z differential distributions and properties of the W and Z production from CMS 20m
        Result of merged abstracts: The production of W and Z bosons has been observed in pp collisions at a center-of-mass energy of 7 and 8 TeV using data collected in the CMS experiment. W events were selected containing an isolated, energetic electron or muon. Z events were selected containing a pair of isolated, energetic electrons or muons. We present studies of single and double differential cross sections for W/Z/DY production. The final state radiation properties are discussed. The production of W and Z bosons has been observed in pp collisions at a center-of-mass energy of 7 and 8 TeV using data collected in the CMS experiment. W events were selected containing an isolated, energetic electron or muon. Z events were selected containing a pair of isolated, energetic electrons or muons. We present measurements of the DY angular coefficients, AFB, properties of hadronic decays.
        Speaker: Dr. Ping Tan (The Univ. of Iowa, United States)
        Slides
      • 15:50
        Measurement of the muon charge asymmetry in inclusive W production at sqrt(s)=7 TeV at CMS and an improved determination of light parton distribution functions 15m
        Measurements of the muon charge asymmetry in inclusive pp to WX production at sqrt(s)=7 TeV are presented. The data sample corresponds to an integrated luminosity of 4.7 inverse femtobarns recorded with the CMS detector at the LHC. With a sample of more than twenty million W to mu nu events, the statistical precision is greatly improved in comparison to previous measurements. These new results provide additional constraints on the parton distribution functions of the proton in the range of the Bjorken scaling variable x from 10E-3 to 10E-1. These measurements and the recent CMS measurement of associated W + charm production are used together with the cross sections for inclusive deep inelastic ep scattering at HERA in a next-to-leading-order QCD analysis. The determination of the valence quark distributions is improved, and the strange-quark distribution is probed directly through the leading-order process g + s to W + c in proton-proton collisions at the LHC.
        Speaker: Mr. Saranya Ghosh (Tata Institute of Fundamental Research (TIFR), Mumbai)
        Slides
      • 16:05
        Electroweak corrections to Z+2jets production at the LHC 15m
        We present results for the electroweak corrections to the hadronic production of a charged lepton pair in association with two jets and give detailed predictions for the LHC operating at 13 TeV. While corrections to the total cross section are small, we find significant non-uniform distortions in high-energy tails due to electroweak Sudakov logarithms.
        Speaker: Dr. Lars Hofer (IFAE Barcelona)
        Slides
      • 16:20
        Measurement of the electroweak production cross section of vector bosons associated with dijets with the ATLAS detector 15m
        Measurement of production of vector bosons associated with two forward jets is reported based on 20 fb-1  of data at sqrt(s) = 8 TeV  recorded by the ATLAS experiment. The measurement is performed in various fiducial volumes, sensitive to QCD and Electroweak production mechanisms. The electroweak component for single Z boson production is extracted by a fit to the dijet invariant mass distribution in a fiducial region chosen to enhance the electroweak contribution over the dominant background in which the jets are produced via the strong interaction. The measured electroweak cross section  is in good agreement with the Standard Model expectations.
        Speakers: Prof. Antonella De Santo (University of Sussex), Dr. Emily Nurse (University College London)
        Slides
      • 16:35
        Electroweak production and hadronic activity in events with a Z and forward/backward jets with CMS 15m
        The measurement of the electroweak production cross section of a Z-boson with two jets in proton-proton collisions by the CMS experiment is presented. The cross section is measured in dielectron and dimuon final states and the measurement, combining different methods and channels is in agreement with the theory prediction.The hadronic activity in events with Z-boson production in association with jets is also studied, in particular in the rapidity interval between the associated forward/backward jets.
        Speaker: Dr. Paolo Azzurri (Univ. di Pisa e Sez. dell'INFN (Italy))
        Slides
      • 16:50
        Electroweak physics at LHCb 20m
        The LHCb forward acceptance covers a range of rapidities not accessible by the other LHC experiments, allowing for complementary measurements. We report recent measurements of electroweak boson production, either inclusive, or in association with a jet or a D meson.
        Speaker: Dr. Stephen Farry (University of Liverpool)
        Slides
      • 17:10
        Measurements of the W charge asymmetry, the weak mixing angle and Z phi* in pp(bar) collisions with the D0 detector 20m
        Result of merged abstracts: We present charge asymmetry measurements from $W$ boson decays in both electron and muon channels, with 7.3 fb-1 to 9.7 fb-1 of Run II data collected by the D0 detector at the Fermilab Tevatron Collider. In the electron channel, we present the lepton asymmetry as a function of the electron transverse momentum and pseudo-rapidity out to |eta| \leq 3.2; we also give the W charge asymmetry as a function of W boson rapidity. These asymmetries are compared with next-to-leading order perturbative quantum chromodynamics calculations. In the muon channel, we present the lepton asymmetry for three kinematic (p_T(mu), MET) bins. These charge asymmetry measurements will allow more accurate determinations of the proton parton distribution functions. Using all RunII data collected by the D0 detector at the Fermilab Tevatron Collider, we present measurements of the forward-backward charge asymmetry distribution of e+e- as a function of dielectron invariant mass around the Z pole and an extraction of the effective weak mixing angle. The measured value of the weak mixing angle is the most precise from light quark interactions, and comparable to the best LEP and SLD results. We also present measurements of the Z/gamma* variable phi. The measurement of phi* probes the same physical effects as the Z/gamma* boson transverse momentum, but is less susceptible to the effects of experimental resolution and efficiency. The phi* distribution is measured in three invariant mass regions, and compared with higher-order predictions.
        Speaker: Mr. Siqi Yang (University of Science and Technology of China)
        Slides
    • 17:30 → 18:00
      Coffee 30m
    • 18:00 → 20:00
      Poster Session
  • Saturday, 5 July
    • 09:00 → 11:00
      Astroparticle Physics and Cosmology Auditorium 3A ()

      Auditorium 3A

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Mr. Juande Zornoza (IFIC)
      • 09:00
        Status of the early construction phase of the BAIKAL-GVD 18m
        The second-stage neutrino telescope BAIKAL-GVD in Lake Baikal will be a research infrastructure aimed mainly at studying astrophysical neutrino fluxes by recording the Cherenkov radiation of the secondary muons and showers generated in neutrino interactions. The design for the BAIKAL-GVD neutrino telescope is an array of photomultiplier tubes each enclosed in a transparent pressure sphere to comprise an optical module (OM). The OMs are arranged on vertical load-carrying cables to form strings. The final configuration of telescope will consist of 27 clusters of strings – functionally independent subarrays, which are connected to shore by individual electro-optical cables. Muon effective area rises from 0.3 km2 at 1 TeV to about 1.8 km2 asymptotically and shower effective volumes are about 0.4–2.4 km3 above 10 TeV. During the R&D phase of the GVD project in 2008–2010 years the basic elements of GVD – new optical modules, FADC readout units, underwater communications and trigger systems – have been developed, produced and tested in situ by long-term operating prototype strings in Lake Baikal. The prototyping/early construction phase of the BAIKAL-GVD project which aims at deployment and operation of the first Demonstration Cluster has been started in April 2011 with the deployment of a three string engineering array which comprises all basic elements and systems of the GVD in Lake Baikal and was connected to shore by electro-optical cable. Demonstration Cluster will comprise eight 345 m long strings of optical modules – seven peripheral strings are uniformly arranged at a 60 m distance around a central one. Each string comprises 24 OMs spaced by 15 m at depths of 950–1300 m below the surface. OMs on each string are combined in two sections – detection units of telescope. Also the Demonstration Cluster will comprise an acoustic positioning system and an instrumentation string with equipment for array calibration and monitoring of environment parameters. An important step on realization of the GVD project was made in 2013 by the deployment of the first stage of Demonstration Cluster which contains 72 OMs arranged on three 345 m long full-scale strings, as well as equipment of an acoustic positioning system and instrumentation string with an array calibration and environment monitoring equipment. This configuration has been upgraded to 5 string array in 2014. Deployment of the Demonstration Cluster will be completed in 2015. The review of the design and status of the demonstration cluster construction will be presented.
        Speaker: Dr. Bair Shaybonov (JINR)
        Slides
      • 09:18
        Recent Results of the ANTARES Neutrino Telescope 17m
        The discovery of cosmic neutrinos of astrophysical origin by IceCube has started a new chapter in the field of Neutrino Astronomy and has officially initiated the neutrino era in high-energy astrophysics. Noticeably, a small accumulation of events in the region near the Galactic Centre has been observed: a telescope in the Mediterranean Sea constitutes a great opportunity for the physics quest, since it offers a perfect complementarity to IceCube and, in particular, a better visibility of the Galactic Centre. ANTARES (Astronomy with a Neutrino Telescope and Abyss Environmental RESearch) is the first operational Cherenkov neutrino telescope in the Mediterranean Sea and the largest neutrino detector in the Northern hemisphere, covering an area of about 0.1 km2; located ~40 km offshore Toulon, France, at a depth of 2475m, it has been completed in June 2008 and it is currently taking data. It consists of a tri-dimensional array of 885 photo-multipliers tubes (PMTs), distributed in 12 lines. ANTARES has recently performed a search for an excess of high energy neutrinos in the direction of the Galactic Centre, close to the accumulation of the IceCube events. The results of this search will be presented, together with other achievements of the experiment, for instance the search for point-like and extended neutrino sources and the search for neutrino emission from the Fermi bubbles. A key attention is given to the multi-messenger approach, by looking for correlations of neutrinos with GeV/TeV gamma-rays, charged cosmic rays and gravitational waves from astrophysical objects. Results on the indirect search for dark matter will be presented in a separated contribution. ANTARES offers a first view of the Neutrino Sky from the Mediterranean and its results makes more compelling the expectations for the next generation experiment, KM3NeT.
        Speaker: Dr. Giulia De Bonis (INFN)
        Slides
      • 09:35
        Dark Matter Searches with ANTARES Neutrino Telescope 13m
        The ANTARES Collaboration is operating the largest water Cherenkov neutrino telescope in the Northern hemisphere, installed in the Mediterranean Sea. One of the objectives of ANTARES is the search for neutrinos produced in self-annihilation of Dark Matter particles. The results on the search for Dark Matter annihilations in the Sun with the data recorded between 2007 and 2012 are presented. The obtained competitive limits on the WIMP-proton cross-section are compared to the ones of other indirect and direct detection experiments as well as to predictions of SUSY models. The possibility of testing secluded dark matter models with this search is also addressed. Results of ANTARES on Dark Matter searches towards the Galactic Centre are also presented, leading to competitive limits on the annihilation cross-sections for high mass WIMPs. Finally, the work on indirect searches towards dwarf galaxies and the centre of the Earth will also be presented.
        Speaker: Miguel Ardid (Universitat Politècnica de València)
        Slides
      • 09:48
        Status and physics goals of KM3NeT 18m
        The KM3NeT Collaboration has started the first phase of construction of a next generation high-energy neutrino telescope in the Mediterranean Sea. With several cubic kilometres instrumented with thousands optical sensors, KM3NeT will be, when completed, the largest and most sensitive high-energy neutrino detector. Thanks to its location in the Northern hemisphere and to its large instrumented volume KM3NeT will be the optimal instrument to search for neutrinos from the Southern sky and in particular from the Galactic plane, thus making it complementary to IceCube. The full KM3NeT detector will be a distributed, networked infrastructure comprising several detector blocks with an array of optical sensors. Each block will contain about one hundred detection units, i.e. vertical structures with a height of about 700 m hosting the optical sensors. In Italy, off the coast of Capo Passero, and in France, off the coast of Toulon, the construction of the KM3NeT-It and KM3NeT-Fr infrastructures respectively is in progress. The status of construction of the KM3NeT detector will be presented as well as its capability to discover neutrino sources.
        Speaker: Dr. Paolo Piattelli (INFN)
        Slides
      • 10:06
        Status of GADZOOKS!: Neutron Tagging in Super-Kamiokande 18m
        The GADZOOKS! project pursues the upgrade of the Super-Kamiokande (SK) detector as a way to efficiently detect thermal neutrons. Inverse beta decay reactions, as well as charged current quasi-elastic (CCQE) scattering of low energy anti-neutrinos (up to a few hundreds of MeV) in SK, produce one positron and one neutron in the final state. Being able to observe the final state neutron in coincidence with the prompt positron would mean that SK could identify these reactions as genuine with very high confidence. GADZOOKS! will open to Super-Kamiokande - and water Cherenkov detectors in general - a wealth of physics currently inaccessible due to background limitations. The most important is observing for the first time the diffuse supernova neutrino background: Super-Kamiokande enriched with gadolinium will discover it after few years of running. In GADZOOKS! we will dissolve a Gadolinium (Gd) salt in the water of SK at a loading of 0.2% by mass. The Gd has an enormous absorption cross section for thermal neutrons, emitting in the process an ~8 MeV gamma cascade measurable by SK. Thus, by a double coincidence in space and time of the signals recorded by SK from the positron and the ~8 MeV gamma cascade from the Gd-capture of the neutron, low energy anti-neutrinos interacting in the detector will be identified with a large efficiency, > 80%. The main R&D program towards GADZOOKS! is EGADS: a 200 ton fully instrumented tank built in a new cavern in the Kamioka mine. EGADS incorporates all the necessary subsystems to make GADZOOKS! a reality, namely pretreatment, selective filtration, monitoring of different parameters (water transparency, Gd concentration...) and Gd recovery. In this contribution we will describe EGADS, we will present its current status and discuss the main results and conclusions arrived at so far. In addition, we will analyze other issues specific to the running of GADZOOKS!, like radiopurity, CCQE reconstruction, and its impact to other SK measurements.
        Speaker: Mr. Pablo Fernández (UAM)
        Slides
      • 10:24
        Measurement of the TeV atmospheric muon charge ratio with the full OPERA data set 18m
        The OPERA detector, designed to search for muon- to tau-neutrino oscillations in direct appearance mode, is located in the underground Gran Sasso laboratory, a privileged location to study TeV-scale cosmic rays. Given the large rock depth and the detector’s wide acceptance, the apparatus was used to measure the atmospheric muon charge ratio in the TeV energy region. The muon charge ratio, defined as the number of positive over negative charged muons, provides an understanding of the mechanism of multiparticle production in the atmosphere in kinematic regions not accessible to accelerators, as well as information on the primary cosmic ray composition. We present the results obtained with the full statistics collected by OPERA from 2008 to 2012. The combination of two data sets with opposite magnet polarities allows minimizing systematic uncertainties and reaching an accurate determination of the muon charge ratio. Relevant parameters on the composition of primary cosmic rays and the associated kaon production in the forward fragmentation region are obtained.
        Speaker: Dr. Nicoletta Mauri (Università di Bologna and INFN)
        Slides
      • 10:42
        On the flavor composition of the high-energy neutrino events in IceCube 18m
        The IceCube experiment has recently reported the observation of 28 high-energy (> 30 TeV) neutrino events, separated into 21 showers and 7 muon tracks, consistent with an extraterrestrial origin. In this talk we discuss the compatibility of such an observation with possible combinations of neutrino flavors with relative proportion (alpha_e:alpha_mu:alpha_tau). Although the 7:21 track-to-shower ratio is naively favored for the canonical (1:1:1) at Earth, this is not true once the atmospheric muon and neutrino backgrounds are properly accounted for. We find that, for an astrophysical neutrino E^(-2) energy spectrum, (1:1:1) at Earth from hadronic sources is disfavored at 79% CL. If this proportion does not change, six more years of data would be needed to exclude (1:1:1) at Earth at 3 sigma CL. Indeed, with the recently-released preliminary 3-year data, that flavor composition is excluded at 91% CL. The best-fit is obtained for (1:0:0) at Earth, which cannot be achieved from any flavor ratio at sources with averaged oscillations during propagation. If confirmed, this result would suggest either a misunderstanding of the expected background events, or a misidentification of tracks as showers, or even more compellingly, some exotic physics which deviates from the standard scenario.
        Speaker: Dr. Sergio Palomares-Ruiz (IFIC)
        Slides
    • 09:00 → 11:00
      BEH Physics Auditorium 1 ()

      Auditorium 1

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Dmitri Denisov (Fermilab)
      • 09:00
        Effective Lagrangian approach to the EWSB sector 15m
        In a model independent framework, the effects of new physics can be parametrized in terms of an effective Lagrangian at the electroweak scale. If the SU(2)L x U(1)Y gauge symmetry is linearly realized, these effects appear at lowest order as dimension--six operators, containing all the SM fields an the light scalar doublet. With a proper choice of the operator basis we perform a global fit to all the existing updated available data related to the EWSB sector: triple gauge boson vertex (TGV) measurements, electroweak precision tests and Higgs searches. In this framework modifications of the couplings of the Higgs field to the electroweak gauge bosons are related to anomalous TGVs. We show that the analysis of the latest Higgs boson data at the LHC and Tevatron gives rise to strong bounds on TGVs that are complementary to those from direct TGV analysis. We then present the tight constraints on TGVs obtained by combining all the available data on direct TGV studies and on Higgs production analysis. Interestingly, we show that this correlated pattern of deviations from Standard Model predictions and couplings can be different for theories of new physics based on a non-linear realization of the SU(2)L×U(1)Y symmetry. Furthermore, anomalous signals expected at first order in the non-linear realization may appear only at higher orders of the linear one, and viceversa. We analyze in detail the impact of both type of discriminating signals on LHC physics. They could lead to hints on the nature of the observed boson.
        Speaker: Mr. Juan Gonzalez-Fraile (Universitat de Barcelona)
        Slides
      • 09:15
        Global Bayesian analysis of the Higgs couplings 15m
        We perform a global Bayesian fit of the Higgs couplings to the latest experimental data, combining the LHC Higgs data with electroweak precision measurements. We consider an effective Lagrangian for a light Higgs boson, and analyze constraints on the modified Higgs couplings to the SM vector bosons and to the SM fermions. We discuss implications of the fit results for new physics models.
        Speaker: Mr. Diptimoy Ghosh (INFN, Rome)
        Slides
      • 09:30
        Higgs boson production constraints on anomalous fermion couplings 15m
        Physics beyond the standard model (SM) can be parameterized with an effective Lagrangian that respects the symmetries of the standard model and contains many operators of dimension six. We consider the subset of these operators that is responsible for flavor diagonal anomalous color magnetic (CMDM) and electric (CEDM) dipole couplings between quarks and gluons. Invariance of these operators under the SM implies that they contribute to Higgs boson production at the LHC and we study the corresponding constraints that can be placed on them. In a similar manner we study the constraints that can be placed on lepton anomalous magnetic moments, electric dipole moments and weak dipole moments at the LHC.
        Speaker: Prof. German Valencia (Iowa State University)
        Slides
      • 09:45
        Softening Higgs Naturalness: an Effective Field Theory Analysis 15m
        We use an effective field theory (EFT) prescription to accommodate naturalness in the Standard Model (SM) Higgs sector. We study the 1-loop corrections to the Higgs mass which are generated by the (complete) set of relevant effective operators of dimension n>4, assuming that the SM's degrees of freedom and gauge symmetries are valid up to some new physics scale \Lambda. We find that there are only three classes of higher dimensional effective operators which can balance the SM's 1-loop corrections to the Higgs mass, and that these operators can be generated in the underlying heavy theory through tree-level exchanges of a heavy singlet or triplet scalar, a heavy isosinglet, doublet or isotriplet fermion and a heavy isosinglet or isotriplet vector-boson. Using the EFT naturalness as a guide, we demonstrate how naturalness can be restored within simple toy models containing these heavy degrees of freedom. In particular, we show that the SM Higgs sector can be kept natural up to an arbitrary large scale if certain relations hold between the masses and couplings of the heavy and SM fields; the amount of fine-tuning required depends on the amount of fine-tuning one is willing to tolerate in the Higgs mass corrections.
        Speaker: Dr. Shaouly Bar-Shalom (Technion, Haifa, Israel)
        Slides
      • 10:00
        EW Chiral Lagrangian with a Light Higgs and the gamma gamma--> WL+ WL− and gamma gamma-->ZL ZL scattering at One Loop 15m
        In this work we study the $\gamma\gamma\to W^+_L W^-_L$ and $\gamma\gamma\to Z_L Z_L$ scattering processes within the effective chiral Lagrangian approach, including a light Higgs-like scalar as a dynamical field together with the would-be-Goldstone bosons $w^\pm$ and $z$ associated to the electroweak symmetry breaking. This approach is inspired by the possibility that the Higgs-like boson be a composite particle behaving as another Goldstone boson, and assumes the existence of a mass gap between $m_h$, $m_W$, $m_Z$ and the potential new emergent resonances, setting an intermediate energy region (above $m_{h,W,Z}$ and below the resonance masses) where the use of these effective chiral Lagrangians are the most appropriate tools to compute the relevant observables. We analyse in detail the proper chiral counting rules for the present case of photon-photon scattering and provide the one-loop $\gamma\gamma\to W^+_L W^-_L$ and $\gamma\gamma\to Z_L Z_L$ scattering amplitudes within this Effective Chiral Lagrangian approach, including a discussion on the involved renormalization procedure. We also propose here a joint analysis of our results for the two-photon scattering amplitudes together with other photonic processes and electroweak precision observables for a future comparison with data. This could help to disentangle the nature of the light Higgs-like particle.
        Speaker: Dr. Juan Jose Sanz-Cillero (Universidad Autonoma de Madrid - IFT)
        Slides
      • 10:15
        Vacuum stability, Higgs and top masses, and new physics 15m
        One of the scenarios considered in these days explores the possibility for the SM to be valid up to the Planck scale. The phase diagram for the stability of the EW vacuum is then derived assuming that new physics interactions at this scale have no impact on it. In particular, for the central values of M_H and M_t, the EW vacuum is metastable, and its lifetime is obtained ignoring new physics. I show that, although new physics interactions appear in terms of higher dimensional operators (and we could naively expect their contribution to be suppressed), due to the non-perturbative nature of the tunnelling, they can have great impact on the EW vacuum lifetime. As a result, the SM phase diagram, far from being universal, strongly depends on new physics. This has a far reaching consequences, as specific BSM candidates can be tested against this stability analysis. Finally, contrary to some claims, higher precision measurements of M_t and M_H cannot provide any definite response on the stability of the EW vacuum. The latter strongly depends on new physics.
        Speaker: Prof. Vincenzo Branchina (University of Catania)
        Slides
      • 10:30
        Dilaton vs Higgs: Nearly Conformal Physics 15m
        We consider the model containing a dilaton vs Higgs boson in the nearly conformal sector (NCS). The potential of a dilaton in NCS is linearly rising with distances. The light scalar dilaton would be one of the best candidates to explain the LHC data in recent discovery of a Higgs-like resonance around 125 GeV.
        Speaker: Dr. Gennady Kozlov (JINR)
        Slides
      • 10:45
        Higgs boson physics and LHC phenomenology in an inverted-hierarchy flavor symmetry model 15m
        \begin{abstract} The LHC phenomenology of a low-scale gauged flavor symmetry model with inverted hierarchy is studied. A new scalar (a flavon) emerges with mass in the TeV range along with a new heavy fermion associated with the standard model top quark. After verifying the constraints from electroweak precision observables, we investigate the influence of the model on Higgs boson physics notably its production cross section and decay branching fractions. Limits on the flavon $s$ from heavy Higgs boson searches at the LHC at 7 and 8 TeV are presented. The branching fractions of the flavon are computed as a function of the flavon mass and the Higgs-flavon mixing angle. We also explore possible discovery of the flavon at 14 TeV, particularly the $s \rightarrow Z^0Z^0$ decay channel in the $2\ell2\ell'$ final state, and standard model Higgs boson pair production $s \rightarrow hh$ in the $b\bar{b}\gamma\gamma$ final state. We conclude that the flavon mass range up to $500$ GeV could probed down to quite small values of the Higgs-flavon mixing angle with 300 fb$^{-1}$ of integrated luminosity at 14 TeV. \end{abstract}
        Speaker: Dr. Edmond BERGER (Argonne National Laboratory, USA)
        Slides
    • 09:00 → 11:00
      Detector RD and Performance Auditorium 3B ()

      Auditorium 3B

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Dr. Ivan Vila Alvarez (Instituto de Física de Cantabria (CSIC-UC))
      • 09:00
        Optimization of a detector for the ILC 20m
        The two detector concepts for the International Linear Collider, SiD and ILD, were described in the Detailed Baseline Design documents, which are part of the ILC Technical Design Report. These designs represented a large body of work on detector prototyping and physics studies. Together, these studies established the feasibility of constructing these detectors to address the full range of the ILC physics program. After the discovery of the Higgs particle at CERN many of the requirements for a detector at the ILC have been sharpened. In addition, as work has continued to carry prototyping work into realistic sections of the future detectors, opportunities for improvement and optimization have naturally arisen both in terms of physics performance and cost. Such opportunities are also enhanced by the further development of advanced technologies. This talk will focus on these opportunities with examples from vertex detectors, the main tracking systems, and the electromagnetic and hadronic calorimeters from both SiD and ILD.
        Speaker: Dr. Taikan Suehara (Kyushu University)
        Slides
      • 09:20
        Engineering Challenges for detectors at the ILC 20m
        Over the last years two proposals for experiments at the ILC have been developed. Extensive R&D has been carried out around the world to develop the needed technologies. Furthermore a first round of engineering studies was made as part of the ILC TDR to understand the integration of these different sub-systems into coherent and integrated detector concepts. Among the key challenges for the subdetectors are the extreme low mass/ low power requirements or the extreme channel densities needed in particle flow based detectors. Throughout these studies special care was taken to ensure that the engineering models and the simulation models, used in studies of the physics capabilities of the detectors, stay synchronized. In the near future, the models will need to be evolved to take the special requirements of the potential ILC site in Japan into account. In this talk, the state of the integration of the detectors, and the future directions, will be discussed.
        Speaker: Marco Oriunno (SLAC)
        Slides
      • 09:40
        CLIC detector: performance optimisation for e+e- physics above 1 TeV and status of the corresponding R&D activities 20m
        Detectors at CLIC are optimised for precision e+e- physics at multi-TeV centre-of-mass energies, as well as for the CLIC-specific beam timing conditions and beam-induced background processes. The talk will provide an overview of these requirements, illustrated on the basis of example physics benchmark processes, and show how optimal physics performance can be achieved under these conditions. The resulting requirements set very high demands on sub-detector capabilities. The vertex and tracking detectors require very small cell sizes and hit timing at the 10 ns level, as well as ultra-low mass, facilitated by power pulsing and air cooling. The calorimetry calls for ultra dense solutions with high granularity, large dynamic range and hit timing at the 1 ns level. Detector R&D following these stringent requirements is progressing well in several areas. A status report on the innovative detector R&D efforts for CLIC will be included in the presentation.
        Speaker: Marcel Demarteau (Argonne National Laboratory)
        Slides
      • 10:00
        Potential and challenges of the physics measurements with very forward detectors at linear colliders 20m
        The very forward region of the detector at a future linear collider will be instrumented with two sampling calorimeters - BeamCal and LumiCal - for fast beam parameter estimates, precise luminosity measurements, as well as for the improvement of the hermeticity of the detector at small angles. These very forward calorimeters are designed to sustain high radiation doses and deliver precise and valuable data for the machine- and physics-related measurements. In this talk the challenges of the luminosity measurement, as well as of the low-angle particle identification will be discussed, and some of the possible solutions will be presented.
        Speaker: Prof. Ivanka Bozovic Jelisavcic (Vinca Institute of Nuclear Sciences)
        Slides
      • 10:20
        Development of Massive Liquid Argon TPCs for LBNE 20m
        The LBNE experiment will employ liquid argon TPCs for the far detector, representing a major scale-up from the ICARUS and MicroBooNE designs. This talk will describe the progress and plans for the development of the TPC itself, the photon detection system, electronics and the cryogenic systems. Staging plans and strategies for scaling up the design towards the planned 34 kt fiducial mass (50 kt total mass) will be presented. Progress on the development of simulations and reconstruction algorithms will also be presented.
        Speaker: Prof. Jarek Nowak (U. Lancaster (United Kingdom))
        Slides
      • 10:40
        Sensitivity of the DANSS detector to short range neutrino oscillations 20m
        DANSS is a highly segmented 1m^3 plastic scintillator detector. It's 2500 scintillator strips have a Gd loaded reflective cover. Light is collected with 3 wave length shifting fibers per strip and read out with 50 PMTs and 2500 SiPMs. Light collection uniformity across and along the strip as well as the photoelectron yield are adequate to the physics goals of the experiment. Continuous calibration of all strips will minimize the systematic uncertainties in the detector response at different distances from the reactor. Together with the a very high antineutrino counting rate of ~10 thousand per day and a very low background level of less than ~1% this will lead to a high sensitivity of the detector to short range neutrino oscillations. The DANSS will be installed under the industrial 3GW reactor of the Kalinin Nuclear Power Plant at distances varying from 9.7mto 12.2m from the reactor core. Tests of the detector prototype demonstrated that in spite of a small size (20x20x100 cm^3), it is quite sensitive to reactor antineutrinos, detecting about 70 Inverse Beta Decay events per day with the signal-to-background ratio of about unity. The prototype tests have demonstrated feasibility to reach the design performance of the DANSS detector. The DANSS experiment will have a high sensitivity to reactor antineutrino oscillations to sterile neutrinos, suggested recently to explain a so-called "reactor anomaly". It will start data taking early in 2015.
        Speaker: Prof. Mikhail Danilov (ITEP, Representig the DANSS Collaboration (ITEP-JINR))
        Slides
    • 09:00 → 11:00
      Flavour Physics Sala 3+4 ()

      Sala 3+4

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Prof. Rick Van Kooten (Indiana University)
      • 09:00
        Prospects for K+ ->pi+ nu nu observation at CERN in NA62 15m
        The rare decays K+ ->pi+ nu nu are excellent processes to make tests of new physics at the highest scale complementary to LHC thanks to their theoretically cleaness. The NA62 experiment at CERN SPS aims to collect of the order of 100 events in two years of data taking, keeping the background at the level of 10%. Part of the experimental apparatus has been commissioned during a technical run in 2012. The physics prospects and the status of the experiment will be reviewed in view of the first physics run scheduled for 2014.
        Speaker: Dr. Antonino Sergi (University of Birmingham (United Kingdom))
        Slides
      • 09:15
        High statistics measurement of the K+ --> pi0 e+ nu (Ke3) decay form-factors 15m
        The decay K+ --> pi0 e+ nu (Ke3) is studied using in-flight decays detected with the "OKA" setup, working in the RF-separated secondary K+ beam of the U-70 synchrotron. About 10M events are available for the analysis. Preliminary results for the parameters of the f+(t) form-factor are presented. For the linear fit: \lambda_{+}=(2.984 \pm 0.04) \times 10^{-2}; for the quadratic fit: \lambda'_{+}= (2.499 \pm 0.13)\times 10^{-2} \lambda''_{+}=(0.193 \pm 0.048)\times 10^{-2} For the Pole parametrization we get: Mv = 0.889 \pm 0.005 (GeV) For the Dispersive parametrisation: Lambda_{+}=(2.462 \pm 0.032)\times 10^{-2} In the context of searches for exotic tensor and scalar terms we get: F_{T}/f_{+}(0) = (1.20 \pm 1.6) \times 10^{-2} F_{S}/f_{+}(0) = (0.154 \pm 0.5) \times 10^{-2}
        Speaker: Prof. Vladimir Obraztsov (Institute for High Energy Physics, Protvino, Russian Federation)
        Slides
      • 09:30
        Study of $CP$-violating charge asymmetries of like-sign dimuons and first measurement of the forward-backward asymmetry in the production of B+ mesons in pp(bar) collisions 15m
        We present a measurement of the inclusive single muon charge asymmetry and the like-sign dimuon charge asymmetry in pp(bar) collisions using the full data set of 10.4 fb-1 collected with the D0 detector at the Fermilab Tevatron. The measurements differ from the standard modelpredictions of CP violation in these asymmetries with a significance of 3.6 standard deviations. These results are interpreted in a framework of B meson mixing to measure the relative width difference Delta(Gamma_d)\Gamma_d between the mass eigenstates of the B0 meson system, and the semileptonic charge asymmetries tge of $B^0$ and B0_s mesons. We also present the first measurement of the forward-backward asymmetry in b-quark production at a hadron collider using the same dataset. The b-quarks are detected in the fully reconstructed decay B+ -> J/psi K+. The frequent reversal of the magnetic fields in the D0 detector allows for the cancellation of many detector effects. Remaining detector asymmetries are corrected using data-driven methods, and the final results are checked using separate $B^+$ and B^-$ samples.
        Speaker: Marjorie Corcoran (Rice U niversity)
        Slides
      • 09:45
        Status of the KL->pi0nunu Experiment at J-PARC 15m
        J-PARC-E14/KOTO experiment aims at observation of the rare decay KL->pi0nunu using a neutral kaon beam in the Hadron experimental hall at J-PARC. This mode occurs through a flavor-changing neutral current and violates CP symmetry. The branching ratio is calculated in the Standard Model (SM) to be 2.4x10^(-11). Since the theoretical uncertainty is small (~2%), this can be a good probe to explore new physics beyond the SM. KOTO completed the first stage of the detector construction in 2012, performed commissioning runs in early 2013, and finally started the first physics run in May 2013. We took data for about 100 hours with the 24kW beam power, which roughly corresponds to 1/5 of the originally expected amount to reach the Grossman-Nir limit sensitivity of 1.5x10^(-9). We are now analyzing the data, expecting to update the current experimental upper limit of 2.6x10^(-8). In this contribution, the status of the KOTO experiment, including data analysis and prospects, will be reported.
        Speaker: Dr. Tadashi Nomura (KEK)
        Slides
      • 10:00
        Recent KLOE results on Kaon Physics 15m
        The KLOE experiment at the DA$\Phi$NE $\phi$-factory of the INFN Frascati Laboratory collected data corresponding to 2.5 fb$^{−1}$ of integrated luminosity. Neutral kaon pairs produced in phi-meson decays offer a unique possibilità to perform tests of fundamental discrete symmetries. The entanglement of the two kaons is exploited to search for possible violation of CPT symmetry and Lorentz invariance in the context of the Standard-Model Extension (SME) framework. A new approach to the analysis of $\phi \rightarrow K_S K_L \rightarrow \pi^+\pi^-,\pi^+\pi^-$ events has been adopted allowing us to independently measure all four CPT violating parameters $\Delta a_{\mu}$ appearing for neutral kaons in the SME. The final KLOE results on $\Delta a_{\mu}$ will be presented. These are presently the most precise measurements in the quark sector of the SME. We also shortly discuss the perspectives for a new measurement using the KLOE-2 apparatus equipped with a new inner tracker. The measurement of the absolute BR of of the K+ -> 3pi(gamma) decay completes the KLOE program of precise and fully inclusive kaon dominant BR's measurements. The most recent result, BR(K+- --> pi+- pi+ pi-) = (5.56 +- 0.20)% (Chiang et al.), dates back to more than 30 years ago. We use as normalization sample the tags given by K->munu decays. The track of the tagging kaon is backward extrapolated to the interaction point, then the kinematics of the decay phi -> K+ K-, gives us the possibility to define the path of the signal kaon (direction and momentum). The decay products of the kaons have a very low momentum, less than 200 MeV/c, and curl up in the KLOE magnetic field (0.52 T). To optimize the quality of the track reconstruction we select kaons decaying before the Drift Chamber Inner Wall (inner radius(DC) = 25 cm), so that only their decay products cross the DC (three tracks instead of four). We require at least two reconstructed tracks (pion candidates) and we count the number of K->3pi(gamma) decays from the missing mass spectrum. The KLOE result on the BR(K+ ->pi+pi-pi+ (gamma)) will be presented.
        Speaker: Dr. eryk czerwinski (LNF (Frascati, Italy))
        Slides
      • 10:15
        Flavor Changing Heavy Higgs Interactions at the LHC 15m
        We adopt a general two Higgs doublet model to study flavor changing neutral Higgs interactions at the LHC. We focus on the production of a heavy Higgs boson (H) decaying into a top quark and a charm quark with the final state of b c\ell\nu. In the decoupling limit with a SM-like Higgs scalar (h), the production (gg \to H) and decay (H \to tc) of H can be sustained by sin(\beta-\alpha) that is close to one. Promising results have been found for the LHC with a collider energy of 13 TeV or 14 TeV.
        Speaker: Prof. Chung Kao (University of Oklahoma)
        Slides
      • 10:30
        Constraints on a Class of Two-Higgs Doublet Models with tree level FCNC 15m
        Relevant constraints and selected phenomenological implications of a class of two Higgs doublet models where flavour-changing neutral currents (FCNC) couplings are suppressed by small entries of the mixing matrix are analysed. This property of the considered models is the result of a discrete symmetry of the Lagrangian such that the FCNC are completely fixed, in the quark sector, by the CKM mixing matrix V and the ratio of the vacuum expectation values of the neutral Higgs. Extending it to the leptonic sector introduces FCNC controlled by the PMNS mixing matrix. The analysis involves a significant number of processes which include tree and loop level transitions mediated by a charged and/or neutral Higgses. The new physical scalars, i.e. beyond the standard Higgs boson, can have masses within experimental reach.
        Speaker: Dr. Miguel Nebot (U. of Valencia - IFIC)
        Slides
      • 10:45
        b-flavour tagging in pp collisions 15m
        An essential ingredient of all time-dependent CP violation studies of B mesons is the ability to tag the initial flavour of the B meson. The harsh environment of 7 and 8 TeV pp collisions makes this a particularly difficult enterprise. We report progresses in the flavour tagging of B0 and Bs mesons.
        Speaker: Mirco Dorigo (EPFL)
        Slides
    • 09:00 → 11:20
      Lepton Flavour Violation Sala 6+7 ()

      Sala 6+7

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Prof. David Hitlin (Caltech)
      • 09:00
        Search for lepton-flavour violating muon decay in MEG 30m
        The MEG experiment in search for the lepton-flavour violating muon decay mu -> e gamma completed its data-taking in August 2013.  The new data in 2013 are now being analysed together with the data taken in 2012 with improved analysis algorithms, which will eventually double the total data statistics. The latest result from the search analysis will be presented.  The status and prospect of the MEG upgrade (MEG II) with an ultimate sensitivity ten times higher than the present MEG will also be described.
        Speaker: Dr. donato nicolo (Pisa University & INFN)
        Slides
      • 09:30
        The Mu2e Experiment at Fermilab 30m
        Mu2e will search for coherent, neutrino-less conversion of muons into electrons in the field of a nucleus with a sensitivity improvement of a factor of 10,000 over existing limits. Such a lepton flavor-violating reaction probes new physics at a scale inaccessible with direct searches at either present or planned high energy colliders. The experiment both complements and extends the current search for muon decay to electron+gamma at MEG and searches for new physics at the LHC. We will present the physics motivation for Mu2e, as well as the design of the muon beamline and the detector.
        Speaker: Andrei Gaponenko (Fermilab)
        Slides
      • 10:00
        The COMET experiment: A search for muon-to-electron conversion at J-PARC 30m
        The COMET Experiment at J-PARC aims to search for the lepton-flavour violating process of muon to electron conversion in a muonic atom, $\mu^{-}N \rightarrow \mathrm{e}^{-}N$, with a branching-ratio sensitivity of $6 \times 10^{−17}$, in order to explore the parameter region predicted by most well-motivated theoretical models beyond the Standard Model. The need for this sensitivity places several stringent requirements on both the muon beam and the detector system. In order to realize the experiment effectively, a staged approach to deployment is endorsed by J-PARC Program Advisory Committee and KEK, and the ``COMET Phase-I'' experiment will commence engineering runs in 2016. The current R \& D and construction status and prospects of the experiment are presented in addition to the experimental overview.
        Speaker: Dr. Hajime NISHIGUCHI (KEK)
        Slides
      • 10:30
        Search for Muon to Electron Conversion in Nuclear Field at J-PARC MLF 25m
        A new experiment to search for muon to electron conversion in nuclear field, DeeMe, is proposed at J-PARC Materials and Life Science Experimental Facility (MLF). This experiment will be carried out at a brand-new beamline (H-Line) which will be constructed at J-PARC MLF Muon Science Establishment (MUSE). Muonic atoms formed in a muon production target will be utilized. The signal electrons from muon to electron conversion will be captured and transported to a spectrometer by the beamline. The single event sensitivity which will be achieved by DeeMe experiment is estimated to be 2x10^{-14} with a silicon carbide (SiC) muon production target and 1 year data acquisition, while the current upper limit is of the order of 10^{-13}. The preparation of the experiment is in progress. The simulation studies for beamline optics, background estimation and spectrometer calibration were performed. Some performance tests of the prototype of tracking device (MWPC) have been done and further R&D is ongoing. The SiC muon production target is under development. The current graphite target of MLF MUSE will be replaced with a SiC target in order to improve physics sensitivity of the experiment and the preparation for the replacement is also ongoing. DeeMe already has Stage-2 approval from PAC under KEK-IMSS (Institute of Materials Structure Science), and the experiment will start data taking in 2015.
        Speaker: Dr. Yohei Nakatsugawa (High Energy Accelerator Research Organization (KEK))
        Slides
    • 09:00 → 11:00
      Neutrino Physics: Neutrinos and Nuclei Auditorium 2 ()

      Auditorium 2

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Steve Brice (Fermilab)
      • 09:00
        Quasi-elastic scattering, RPA, 2p2h and neutrino energy reconstruction 15m
        We discuss some nuclear eects, RPA correlations and 2p2h (multinucleon) mechanisms, on charged-current neutrino-nucleus reactions that do not produce a pion in the nal state. We study a wide range of neutrino energies, from few hundreds of MeV up to 10 GeV. We also examine the in uence of 2p2h mechanisms on the neutrino energy reconstruction.
        Speaker: Dr. Juan M Nieves (IFIC, CSIC-UV)
        Slides
      • 09:15
        Quasi-Elastic Scattering in MINERvA 15m
        MINERvA (Main INjector Experiment for v-A) has recently measured neutrino and antineutrino quasi-elastic cross-sections on plastic (CH) scintillator. These results will provide insight into neutrino and anti-neutrino cross sections off of nuclear targets which are important for neutrino oscillation experiments and the probing of the nuclear medium. We will focus on these results and how they compare to the predictions of various nuclear models simulated in the GENIE and NuWro generators. In addition we will present results from a similar analysis of charged current quasi-elastic-like interactions where a final state muon and proton have been identified, but where the kinematics of the event are determined by the leading proton rather than the muon.
        Speaker: Dr. Heidi Schellman (Northwestern University (United States))
        Slides
      • 09:30
        Studies of the Nuclear Environment in MINERvA 15m
        MINERvA (Main INjector ExpeRiment for neutrino-A) is a few-GeV neutrino nucleus scattering experiment at Fermilab that probes the nuclear environment in both inclusive charged current interactions off various targets, and by studying in detail the process of pion production on Carbon, which itself is sensitive to the nuclear environment through final state interactions. An analysis of the nuclear dependence of inclusive charged-current neutrino scattering using events in carbon, iron, lead, and scintillator targets of the MINERvA detector will be presented and compared to models. In addtion a measurement of the differential cross-sections for muon-neutrino charged current charged pion production in the MINERvA active plastic target will be discussed. Both results are of great interest to high energy and nuclear physics and increasingly important for neutrino oscillation experiments.
        Speaker: Dr. Richard Gran (University of Minnesota Duluth)
        Paper
        Slides
      • 09:45
        Effective Spectral Function for Quasielastic Scattering on Nuclei 15m
        Spectral functions that are used in modeling of quasi elastic scattering in neutrino event generators such as GENIE, NEUT, NUANCE and NUWRO, and GiBUU include Fermi gas, local Fermi gas, Bodek-Ritche Fermi gas with high momentum tail, and the Benhar Fantoni two dimensional spectral function. We find that the $\frac{d\sigma}{d\nu}$ predictions for these models are in disagreement with the prediction of $\psi'$ superscaling function which is good extracted from fits to quasielastic electron scattering data on nuclear targets. It is known that spectral functions do not fully describe quasielastic scattering because they only model the initial state. Final state interactions distort the shape of the quasi elastic peak, reduce the cross section at the peak and increase the cross section at the tail of the distribution for large energy transfer to final state nucleons. We show that the kinematic distributions predicted by the $\psi'$ superscaling formalism can be well described by the predictions using a modified "effective spectral function". }
        Speaker: Prof. Arie Bodek (University of Rochester)
        Slides
      • 10:00
        Analysis of muon and electron neutrino charged current interactions in the T2K near detectors 15m
        We present the updated measurement of the muon neutrino interaction rates and spectrum at the T2K near detector complex, ND280, located at the JPARC accelerator facility in Tokai, Japan, 280 meters downstream from the target. The measurements are obtained using all the data collected until 2014. The spectrum measured at ND280 off-axis detector constrains the flux and cross section uncertainties in the T2K oscillation analysis. The great reduction of these uncertainties was achieved thanks to the selection method of the charged-current events in the tracker, in which the selected events are divided into three subsamples based on the charged pion multiplicity in the final state, and fitting the muon spectrum separately for each subsample. The subsamples will be also used to determine the inclusive and exclusive cross section for the T2K flux. The prospects for the future measurements will be presented, including running with anti-neutrino mode beam. The on-axis detector (INGRID) at 280 m was used to select charged current events in the 2014 data as well, and results will be presented on the measurement of the cross sections for the inclusive, quasi elastic and coherent pion production. The main and irreducible background to the observation of νe appearance in T2K comes from the presence of a small intrinsic νe component in the beam originating from muon and kaon decays. This component is expected to represent 1.2% of the total neutrino flux and it has been measured using the Near Detector (ND280) Tracker. A 65% pure sample of νe charged current (CC) interactions is selected by combining the particle identification capabilities of the time projection chambers and of the electromagnetic calorimeters of ND280. The measured ratio between the observed beam νe component and the prediction is 1.01 ± 0.10 providing a direct confirmation of the neutrino fluxes and neutrino cross section modeling used for all the T2K neutrino oscillation analyses. Also the differential νe CC cross section in electron momentum, angle, and Q2 is measured, along with the total flux-averaged cross section.
        Speaker: Dr. Anthony Hillairet (University of Victoria)
        Slides
      • 10:15
        Measurement of Reactor Antineutrino Flux and Spectrum at Daya Bay 15m
        Electron antineutrinos from six 2.9 GW$_{th}$ reactors are detected with six detectors deployed in two near and one far underground experimental halls at Daya Bay. Using 217 days of data, more than 300,000 antineutrino candidates were detected in the three halls. In this talk, a measurement of absolute reactor antineutrino flux and spectrum will be described, including comparisons of the measurement to predictions based on different flux models. Methods of extracting a generic reactor antineutrino spectrum from the measured absolute antineutrino spectrum will be presented, which could be used in place of current flux models.
        Speaker: Dr. Weili Zhong (Institute of High Energy Physics)
        Slides
      • 10:30
        Electromagnetic interactions of neutrinos: a window to new physics 15m
        A wide review on neutrino electromagnetic properties and interactions is presented, both theoretical and experimental aspects of the problem are discussed. It is shown that these studies open a window to new physics. The talk is based on the recent wide review on the subject available on web since March 25, 2014: C.Giunti, A.Studenikin, “Electromagnetic interactions of neutrinos: a window to new physics”, arXiv: 1403.6344 March 25, 2014, 72 pages and more than 350 references.
        Speaker: Prof. Alexander Studenikin (Moscow State University and JINR-Dubna)
        Slides
      • 10:45
        Neutrinos and Nuclear Astrophysics at LUNA 15m
        The LUNA experiment plays an important role in understanding open issue of neutrino physics. As an example, two key reactions of the solar p-p chain $^3He(^3He,2p)^4He$ and $^3He(^4He,\gamma)^7Be$ have been studied at low energy with LUNA, providing an accurate experimental input to the Standard Solar Model and consequently to the study of the neutrino mixing parameters. The LUNA collaboration will study the reaction $^2H(p,\gamma)^3He$ at Big Bang Nucleosynthesis (BBN) energies. This reaction is presently the main source of the $2\%$ uncertainty of the calculated primordial abundance of deuterium in BBN calculations [1]. As it is well known, the abundance of deuterium depends on the number of neutrino families (or any other relativistic species existing in the early Universe, "dark radiation"). Therefore, the comparison of computed and observed deuterium abundances allows to severely constrain the number of neutrino species and/or the lepton degeneracy in the neutrino sector. The paucity of data at BBN energy of the $^2H(p,\gamma)^3He$ reaction is presently the main limitation to exploit the deuterium abundance as a probe of neutrino physics and to improve the BBN estimation of the baryon density. As a matter of fact, the deuterium abundance derived from damped Lyman $\alpha$ (DLA) system observations has presently an error of only $1.5\%$ [1]. The aim of the the new measurement is therefore to substantially improve the $9\%$ error of present $^2H(p,\gamma)^3He$ data at BBN energies [2]. Starting from the present uncertainty of the relevant parameters (i.e. baryon density, observed abundance of deuterium and BBN nuclear cross sections), it will be shown that a renewed study of the $^2H(p,\gamma)^3He$ process is essential to constrain the number of neutrino families and to probe the existence of dark radiation in the early Universe, by using the BBN theory and the cosmic microwave background (CMB) data. [1] R.J. Cooke and M. Pettini: arXiv:1308.3240v1 [astro-ph.CO] 14 Aug 2013. [2] L. Ma et al., Phys. Rev. C 55, 588 (1997).
        Speaker: Dr. Carlo Gustavino (INFN-Roma)
        Slides
    • 09:00 → 11:05
      Strong Interactions and Hadron Physics: Jets II (inclusive jets+alphas) Sala 1 ()

      Sala 1

      Allocated time include time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Dr. Ulla Blumenschein (Goettingen university)
      • 09:00
        Jet physics: algorithms and jet substructure techniques 25m
        Jets are ubiquitous in LHC physics. We will review the advances in algorithms and techniques that have taken place in the past few years, with an emphasis on the role of jet substructure in the analyses of heavy boosted particles.
        Speaker: Matteo Cacciari (LPTHE Paris)
        Slides
      • 09:25
        Measurements of jet production properties in pp collisions with the ATLAS detector 20m
        Several aspects of the jet production in pp collisions have been measured by the ATLAS collaboration. The measurements of the production cross sections of inclusive, di- and tri-jet events probe the dynamics of QCD and can constrain the parton proton structure. The cross sections are measured using jets clustered with the anti-kT algorithm with different distance parameters and compared to expectations based on next-to-leading order QCD calculations, corrected for non-perturbative effects, as well as to next-to-leading order Monte Carlo simulations. Ratios of inclusive cross sections measured at different centre-of-mass energies allow for reduced experimental and/or theoretical uncertainties. Double-differential dijet and trijet cross sections have been measured in proton-proton collisions at 7 TeV as a function of di- and tri-jet masses and the jet rapidity separation. An NLO QCD analysis of the data indicates constraining power for parton distribution functions of the proton. Measurements of multi-jet systems with or without a veto on additional jets, probe QCD radiation effects. The measurement of the dijet azimuthal decorrelations is sensitive to the strong coupling constant. Measurement of splitting scales in the kt clustering algorithm using jets from W+jet events provide a way to investigate jet clustering at different resolution scales. These measurements constitute precision tests of QCD in a new energy regime.
        Speaker: Dr. Bogdan Malaescu (LPNHE Paris)
        Slides
      • 09:45
        Jet production and alpha_s measurements at CMS 20m
        We present CMS results related to jet production cross sections, which pose a central test to perturbative QCD predictions. Results include recent jet, dijet, multijet differential cross section and hadronic event shape measurements performed with 2011 data taken at center-of-mass energy of 7 TeV and 2012 data taken at 8 TeV. Recent Alpha_S extraction results are presented. We also present searches for BFKL effects in the azimuthal correlations of forward-backward and forward-central jets at 7 TeV, and studies of the transition from the perturbative to the non-perturbative regime using minijets at 8 TeV.
        Speaker: Dr. GEORGIOS MAVROMANOLAKIS (UNIVERSITY OF CYPRUS)
        Slides
      • 10:05
        Jet production and QCD measurements at HERA 15m
        The production of inclusive jets as well as of dijet and trijet topologies is investigated at HERA. Both the H1 and the ZEUS experiment have determined the corresponding cross sections with improved experimental precision, compared to previous measurements. For both experiments, a hadronic energy scale uncertainty as small as 1% is reached. The value of the strong coupling constant alpha_s(M_Z) is extracted and its running is probed. Using topologies involving high track multiplicities and an associated jets, the H1 data are used to search for the production and decay of QCD instantons.
        Speaker: Dr. Pawel Sopicki (INP Cracow)
        Slides
      • 10:20
        Alpha_s determination from the C-parameter distribution 15m
        For the e+e- C-parameter we use soft-collinear effective theory to derive a factorization theorem, and then compute the cross section at N3LL + O(alphas^3). Differences with Thrust are highlighted. Our result holds for C in the peak, tail, and far tail regions, and we treat hadronization effects using a universal nonperturbative soft function defined in field theory. We analyze all available C-parameter tail data and obtain a global fit for alphas(mZ) and one nonperturbative parameter Omega1^C with chi^2/dof close to 1. These C-parameter results for alphas(mZ) and Omega1 are in excellent agreement with earlier results from thrust. Furthermore, for the first time we include hadron mass effects in the analysis of thrust and C-parameter experimental data.
        Speaker: Dr. Vicent Mateu (IFIC)
        Slides
      • 10:35
        Alpha_s from tau decays: higher orders and perturbative behaviour 15m
        I present a discussion of recent developments in the QCD description of hadronic tau decays with emphasis in the perturbative contribution. The perturbative series is the main ingredient in the extraction of the strong coupling (alpha_s) from these decays. The ambiguity due to the different prescriptions regarding the renormalization group improvement of the series is studied under different assumptions for the large-order corrections. Our results show that some of the hadronic spectral function moments employed in alpha_s determinations have poor perturbative behaviour and should be avoided. Exploiting this information we develop the optimal theoretical framework for precise alpha_s extractions from the 2014 update of the ALEPH data. Some preliminary results of our 2014 analysis will be discussed.
        Speaker: Dr. Diogo Boito (Technische Universitaet Muenchen --- TUM)
        Slides
      • 10:50
        Precise alpha_s determination from the low-z parton-to-hadron fragmentation functions 15m
        We present a new precise method to extract the QCD coupling constant alpha_s from the energy evolution of the moments of the parton-to-hadron fragmentation functions measured in e+e- annihilation and DIS e-p collisions. The evolution of the moments (multiplicity, peak, width, skewness) of the low momentum charged-hadron distribution in jets is computed at NMLLA+NLO accuracy and compared to the experimental data. Values of Lambda_QCD, and corresponding two-loop coupling constant at the Z resonance, are obtained in excellent numerical agreement with the current world average obtained using other methods at NLO accuracy. A detailed study of the (small) systematic uncertainties associated with this procedure will be also presented. [1] R. Perez-Ramos and D. d'Enterria, "Energy evolution of the moments of the hadron distribution in QCD jets including NNLL resummation and NLO running-coupling corrections''; arXiv:1310.8534. [2] D. d'Enterria and R. Perez-Ramos, "Determination of the strong coupling alpha_s from the energy evolution of the distributions of low momentum hadrons in QCD jets", in preparation.
        Speaker: Dr. David d'Enterria (CERN)
        Slides
    • 09:00 → 09:35
      Top-quark and ElectroWeak Physics: Single boson Sala 8+9 ()

      Sala 8+9

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Conveners: Prof. Jessie Shelton (University of Illinois, Urbana-Champaign), Dr. Roberto Chierici (CNRS)
      • 09:00
        A measurement of the electro-weak mixing angle and an indirect measurement of the W mass at CDF 20m
        We report on precision measurements of the electro-weak mixing angle and an indirect measurement of the W mass extracted from the forward-backward asymmetry of both e+e- and mu+mu- Drell-Yan events in the Z boson mass region at CDF.
        Speaker: Prof. Arie Bodek (University of Rochester)
        Slides
      • 09:20
        Measurement of the W boson mass with the D0 detector 15m
        We present a measurement of the W boson mass using D0 Run II data. We select e + neutrino events consistent with a W decay and extract the W boson mass from the distributions of the electron transverse momentum, the neutrino transverse momentum, and the system transverse mass.
        Speaker: Dr. Hengne Li (University of Virginia)
        Slides
    • 09:35 → 11:00
      Top-quark and ElectroWeak Physics: Multi-boson Sala 8+9

      Sala 8+9

      Valencia, Spain

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Conveners: Prof. Jessie Shelton (University of Illinois, Urbana-Champaign), Dr. Roberto Chierici (CNRS)
      • 09:35
        Measurement of WW production with the ATLAS detector 15m
        The measurement of the WW diboson production cross section in proton-proton interactions is reported from the ATLAS experiment. The analysis requires heavy bosons to decay leptonically, using ee, emu and mumu final states associated with large missing energy. The data are used to test the electroweak sector of the Standard Model and search for evidence for new phenomena. The cross section results are first obtained in phase space regions defined by the decay kinematics and then extrapolated to the full phase space. Differential and total cross sections for WW production are compared to NLO predictions of the Standard Model and used to place constraints on anomalous triple-gauge-boson couplings.
        Speaker: Dr. Kristin Lohwasser (DESY Zeuthen)
        Slides
      • 09:50
        Measurement of the electroweak production cross section of same-sign WW bosons associated with dijets with the ATLAS detector 15m
        The measurement of production of same-sign WW bosons associated with two forward jets
is reported based on 20 fb-1 of data at sqrt(s) = 8 TeV recorded by the ATLAS experiment. The measurements are performed in fiducial volumes, sensitive to QCD and Electroweak production mechanisms. The electroweak of component of same-sign WW production is extracted in a fiducial region with large rapidity difference between two jets with high dijet invariant mass, chosen to enhance the electroweak contribution over the dominant background in which the jets are produced via the strong interaction. The measured electroweak cross section is in good agreement with the Standard Model expectations.
        Speaker: Mr. Christian Gumpert (IKTP, TU Dresden)
        Slides
      • 10:05
        Double-boson and triple-boson production from CMS and limits on aTGC and QGC 20m
        Result of merged abstracts: We present studies of WW, WZ and ZZ diboson production in pp collisions based on data recorded by the CMS detector at the LHC. These include precise measurements the production cross section of these processes at center-of-mass energies of 7 and 8TeV . The leptonic decay modes of the W and Z bosons are used. The results are interpreted in terms of constraints on anomalous triple gauge couplings. We present measurements of triboson production and VV scattering in pp collisions at 8 TeV center-of-mass energy based on data recorded by the CMS detector at the LHC in 2012. The results are interpreted in terms of constraints on anomalous quartic gauge couplings. estigated. In addition we present studies of exclusive and quasi-exclusive gammagamma->W+W- production p-p collisions at the LHC using the CMS detector, and new limits on anomalous quartic couplings.
        Speaker: Mr. Phillip R. Dudero (Texas Tech University)
        Slides
      • 10:25
        Measurement of VZ production cross sections in VZ to Vbbbar decay channels in pp collisions at 8 TeV from CMS 15m
        We present a measurement of the WZ and ZZ production cross sections in proton-proton collisions at 8 TeV in final states where one Z boson decays to b-tagged jets, while the other gauge boson, either W or Z, is detected through its leptonic decay. The results are based on data corresponding to an integrated luminosity of 18.9 /fb collected with the CMS detector at the Large Hadron Collider.
        Speaker: Mr. Philipp David ELLER (ETH Zürich, Switzerland)
        Slides
      • 10:40
        NLO QCD corrections to VVjj production at the LHC 20m
        These processes are important backgrounds to the measurement of the quartic gauge couplings of the Standard Model, to the Higgs signal via vector boson fusion, and to the search for signals of new physics beyond the Standard Model. We present the first calculation of the next-to-leading order QCD corrections to the QCD-induced ZZ production in association with two jets at hadron colliders. As expected, the next-to-leading order corrections reduce significantly the scale uncertainty and show a non-trivial phase space dependence in kinematic distributions. Our code will be publicly available as part of the parton level Monte Carlo program VBFNLO
        Speaker: Dr. Francisco Campanario (IFIC, UV-CSIC)
        Slides
    • 11:00 → 11:30
      Coffee 30m
    • 11:30 → 13:30
      Astroparticle Physics and Cosmology Auditorium 3A ()

      Auditorium 3A

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Mr. Juande Zornoza (IFIC)
      • 11:30
        Astrophysical Neutrinos with the IceCube Detector 24m
        The IceCube Neutrino Observatory at the South Pole has powerful capabilities to explore the universe. Two of its primary goals are to observe cosmic neutrinos with TeV energies and above, and to find astrophysical sources of ultra high energy cosmic rays. IceCube is comprised of a cubic kilometer of glacial ice instrumented with 86 vertical strings, each with 60 optical sensors deployed at depths between 1450 and 2450 meters, and a square kilometer array at the surface. The sensors detect Cherenkov radiation from charged particles produced in all flavors of neutrino interactions in the ice. This talk will focus on the latest IceCube results from searches for high energy astrophysical neutrinos, including the first detection of PeV neutrinos, the highest energy neutrinos detected to date. Evidence will be presented that IceCube has observed, for the first time, a diffuse neutrino flux consistent with an astrophysical origin. This will be followed by an outlook and plans to extend the detector capabilities at highest energies.
        Speaker: Joanna Kiryluk (Stony Brook University)
        Slides
      • 11:54
        Atmospheric neutrinos at high energy 24m
        Neutrinos produced by cosmic-ray interactions in the Earth's atmosphere are a background in the search for neutrinos of astrophysical origin. In addition, they provide a beam that can be used for calibration and to study neutrino properties, such as oscillations. Several issues that arise in evaluating the atmospheric neutrino spectrum up to the PeV range will be addressed in this paper: What is the level of production of prompt neutrinos from decay of charmed hadrons? What is the effect of the steepening of the primary cosmic-ray spectrum at the knee and the energy dependence of the production of the parent mesons that decay to neutrinos? To what extent is it possible to distinguish atmospheric neutrinos from astrophysical neutrinos, for example, by using a muon produced in the same cosmic-ray event as a veto?
        Speaker: Thomas Gaisser (University of Delaware)
        Slides
      • 12:18
        Radio Arrays for Detecting Ultra-high Energy Cosmic Neutrinos 24m
        Ultra-high energy (UHE, >10^18 eV) cosmic neutrinos are anticipated to reveal the most distant, most obscured, and highest energy particle accelerators in the Universe. An almost guaranteed flux of UHE neutrinos is predicted from the interactions of UHE cosmic rays with the cosmic microwave background, and additional contributions may arise from prompt emission at individual sources. The spectrum of UHE neutrinos is a sensitive discriminator of the cosmological evolution of UHE sources, as well as the composition of UHE cosmic rays. At the same time, UHE neutrinos will enable several tests of fundamental physics, including constraints on the neutrino-nucleon interaction cross section at center-of-momentum energies ~100 TeV, and searches for Lorentz invariance violation. Theoretical predictions and subsequent laboratory measurements of coherent radio emission from showers initiated by neutrino interactions in dielectric media (e.g., ice, sand, salt, lunar regolith) have motivated diverse experimental approaches involving "detectors" comprised of up to millions of cubic kilometers of natural materials. I will review experimental progress in the search for UHE cosmic neutrinos with an emphasis on experiments using polar ice as the detection medium (e.g., ANITA, EVA, ARA, ARIANNA, and GNO) and the complementarity of these radio arrays with IceCube.
        Speaker: Keith Bechtol (KICP / University of Chicago)
        Slides
      • 12:42
        Acoustic Detection of Neutrinos: Review and Future Potential 24m
        The acoustic neutrino detection technique is a promising approach for future large-scale detectors with the aim of measuring the small expected flux of cosmogenic neutrinos at energies exceeding 100 PeV. The technique is based on the thermo-acoustic model, which implies that the energy deposition by a particle cascade - resulting from a neutrino interaction in a medium with suitable thermal and acoustic properties - leads to a local heating and a subsequent characteristic pressure pulse that propagates in the surrounding medium. The main advantage of using sound for the detection of neutrino interactions, as opposed to Cherenkov light, lies in the much longer attenuation length of the former type of radiation - several kilometers for sound compared to several ten meters for light in the respective frequency ranges of interest in sea water. As detection media for future detectors, water, ice, salt domes and permafrost have been discussed, but it is the first two which have been investigated most thoroughly by using existing arrays of acoustic receivers - mainly military arrays in various bodies of water - or by implementing dedicated acoustic arrays in Cherenkov neutrino telescopes. Such arrays have been installed in IceCube at the South Pole, in the Lake Baikal experiment in Siberia and in ANTARES and the former Nemo experiment in the Mediterranean Sea. The future KM3NeT neutrino telescope to be installed in the Mediterranean Sea will be equipped with acoustic sensors for position calibration that are suited to also serve acoustic detection purposes. Ongoing experiments in water and ice have established the feasibility of the acoustic neutrino detection technique and allowed for the investigation of prevailing background conditions. Methods to improve the signal detection efficiency and to reduce the rate of mis-identified neutrinos have been devised and potential future large-scale detector designs are investigated using detailed simulations in combination with the wealth of collected experimental data. In this presentation, a brief review of acoustic particle detection, considering both theoretical and experimental aspects, will be given. The current status and plans for the future will be discussed.
        Speaker: Dr. Robert Lahmann (Erlangen Centre for Astroparticle Physics (ECAP))
        Slides
      • 13:06
        Review on gravitational wave detectors 24m
        The ground-based world-wide network of gravitational-wave laser interferometers has the ambitious goal of the first direct detection of gravitational waves. Their detection will provide a fundamental, new tool to probe the universe, with information on supernovae, colliding black holes and rotating neutron stars. In this talk I will give an overview of the status of the gravitational wave instruments, review the most significant observational results obtained so far and their impact on our understanding of gravitational wave sources. I will also briefly outline the future steps to further increase the reach of the instruments (such as Einstein Telescope) or space observatories which which together with the second generation of detectors are expected to lead to the opening of a new observational window on the universe in the coming years.
        Speaker: Prof. Alicia Sintes (Universitat de les Illes Balears)
        Slides
    • 11:30 → 13:35
      BEH Physics Auditorium 1 ()

      Auditorium 1

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Dmitri Denisov (Fermilab)
      • 11:30
        Search for low-mass CP odd Higgs boson 15m
        Searches for low mass CP-odd Higgs boson (A0) predicted in non-minimal supersymmetric extensions of the Standard Model, have been performed at BABAR studying the radiative decays of the Y(nS) resonances, with n=1,2,3. Stringent limits on the production of a light Higgs boson have been set from a variety of decay channels, as A0 to lepton pairs, gluon gluon and q qbar.
        Speaker: Mr. Rocky So (University of British Columbia)
        Slides
      • 11:45
        Searches for Pseudo-scalar Higgs Bosons in the context of 2HDM, MSSM, and NMSSM scenarios with the ATLAS Detector 20m
        Searches for pseudo-scalar Higgs bosons in the context of 2HDM, MSSM, and NMSSM scenarios with the ATLAS detector are presented.
        Speaker: Dr. Eric Feng (Argonne National Laboratory (United States))
        Slides
      • 12:05
        Searches for production of two Higgs bosons using the CMS detector 15m
        Searches for events containing two Higgs bosons are presented using several decay channels of the h(126) boson. The analyses use pp collision data recorded at centre-of-mass energies of 7 and 8 TeV, corresponding to integrated luminosities of 5/fb and 20/fb, respectively. Extended Higgs sector scenarios predict the resonant decay of new particles into a pair of h(126) bosons. These resonant di-Higgs processes are searched in different final states and the results are described.
        Speaker: Dr. Olivier Bondu (CERN)
        Paper
        Slides
      • 12:20
        Bounds on Neutral and Charged Higgs from the LHC 15m
        After the recent discovery of a boson with mass around 125 GeV with Standard Model-like properties, the possibility of an enlarged scalar sector arises as a natural question. The discovery of an extra scalar would be the ultimate proof of this scenario. Keeping the generic Yukawa structure of the Aligned Two-Higgs Doublet Model framework, we study the implications of the LHC data on the allowed scalar spectrum.
        Speaker: Mr. Victor Ilisie (IFIC)
        Slides
      • 12:35
        Status of the Type-II 2HDM 15m
        The precise determination of the Higgs boson couplings (and their comparison with the SM predictions) will be one of the major goals of future collider experiments. To estimate the possible size of signals for physics beyond the SM, such as models with an extended Higgs sector, global analyses of all currently available data are necessary. In this talk I report on the results of our global fits of flavour, electroweak precision and LHC Higgs data in the context of the the type-II two Higgs doublet model (2HDM). Within the 2HDM, I discuss the allowed regions of parameter space and the possible deviations of the Higgs couplings to SM fermions and vector bosons from their SM values. I will also comment on the possible enhancements of triple Higgs couplings in the type-II 2HDM and the implications for heavy Higgs searches and (light) Higgs pair production at the LHC.
        Speaker: Dr. Martin Wiebusch (IPPP Durham)
        Slides
      • 12:50
        Radiative corrections to Higgs coupling constants in two Higgs doublet models 15m
        We calculate one-loop corrected Yukawa coupling constants hff for the standard model (SM) like Higgs boson h in two Higgs doublet models with the softly-broken $Z_2$ symmetry. Under the $Z_2$ symmetry, four types of models with different Yukawa interactions appear. We find that one-loop contributions from extra Higgs bosons change maximally about several % from tree level hff couplings under the constraints from perturbative unitarity and vacuum stability. We find that the pattern of deviations in each type of Yukawa couplings from the SM predictions does not change from tree level predictions with only mixing effects even with maximal radiative corrections. Moreover, when the gauge couplings hVV (V = W, Z) are found to be slightly (with a percent level) differ from the SM predictions, the hff couplings also deviate but more largely. Therefore, in such a case, in addition to determining the type of Yukawa couplings, there is a possibility to obtain more information on the extra Higgs bosons by fingerprinting the theory predictions with future precision data for the hff and hVV couplings at the LHC and the ILC. This talk is based on the paper: "Radiative corrections to the Yukawa coupling constants in two Higgs doublet models", S. Kanemura, M. Kikuchi and K. Yagyu. Phys. Lett. B731 (2014) 27. [arXiv: 1401.0515]
        Speaker: Ms. Mariko Kikuchi (University of Toyama)
        Slides
      • 13:05
        Searches for a high-mass Higgs boson in the ZZ and WW decay channels with the CMS detector 15m
        Searches for a high-mass Higgs boson decaying into WW and ZZ channels has been carried out using data collected at centre-of-mass energies of 7 and 8 TeV at the LHC collider, corresponding to integrated luminosities of 5/fb and 20/fb, respectively. Many different final states have been considered and upper limits on the Higgs boson production cross section have been derived. The results are interpreted in a BSM model containing an additional electroweak singlet.
        Speakers: Dr. Oscar Gonzalez Lopez (CIEMAT (Madrid, Spain)), Dr. Oscar Gonzalez Lopez (CIEMAT)
        Slides
      • 13:20
        Search for a High mass Higgs using the ATLAS detector 15m
        Since the discovery of a Higgs boson by the ATLAS and CMS experiments at the LHC, the emphasis has shifted towards determining whether the new particle is the Standard Model (SM) Higgs boson. The search for additional Higgs boson states addresses this question. In particular the search for high mass states decaying to diboson final states could shed light on the structure of the electroweak symmetry breaking sector. In this presentation the latest ATLAS results on these searches will be discussed.
        Speaker: Mark Neubauer (University of Illinois at Urbana-Champaign)
        Slides
    • 11:30 → 13:30
      Beyond the Standard Model Auditorium 2 ()

      Auditorium 2

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Prof. Tobias Golling (Yale)
      • 11:30
        Kinematic reconstruction of vector-like tops from fully hadronic events 15m
        Vector-like top partners are introduced in various BSM models. After mixing with third generation quarks, decays to th, tZ and bW are possible. Recent searches at the LHC give M > 700-800 GeV. We propose an algorithm to kinematically reconstruct vector-like tops from fully hadronic final states at the LHC Run II. Larger signal yield is expected because the branching ratio top-to-hadrons is large. Jet unclustering / substructure methods prove useful in efficiently rejecting the overwhelming backgrounds. We tag and reconstruct boosted tops and higgses from the heavy decay. Different values of the heavy particle's mass are investigated at moderate integrated luminosity, and smaller branching ratios are discussed. A good signal-to-background ratio is found and it is shown that kinematic reconstruction of the top partner and a mass measurement are possible. We conclude that our study can usefully complement existing searches in (semi)leptonic final states. Paper in preparation.
        Speaker: Mr. Martin Stoll (The University of Tokyo)
        Slides
      • 11:45
        Searches for vector-like quarks, tt and tb resonances with the ATLAS detector 15m
        Various extensions of the Standard Model predict the existence of new types of quarks. We report on several search channels such as vector-like quarks decaying to a Higgs boson and a top quark or to a W boson and a b quark. The talk presents results from searches for new resonances decaying to a top-antitop pair and a top-antibottom pair, including the use of boosted top quark reconstruction techniques. These searches use the data sample recorded in 2012 at sqrt(s)=8 TeV centre-of-mass energy by the ATLAS experiment at the LHC.
        Speaker: Dr. Timothy Andeen (Columbia University)
        Paper
        Slides
      • 12:00
        Searches for vector-like quarks and heavy resonances decaying to 3rd generation quarks with the CMS detector 15m
        In many models of physics beyond the Standard Model the coupling of new physics to third generation quarks is enhanced. We present a review of searches for heavy particles beyond the standard model decaying to final states with top and bottom quarks. This includes searches for heavy gauge bosons and excited states, as well as vector-like quarks. The searches span a range of final states, from multi-leptonic to entirely hadronic. We use data collected with the CMS experiment during the year 2012, in proton-proton collisions at the LHC at a centre-of-mass energy of 8 TeV.
        Speaker: Dr. Roman Kogler (University of Hamburg, Germany)
        Slides
      • 12:15
        Prospects for BSM searches at the high-luminosity LHC with the ATLAS detector 15m
        Discovering new physics beyond the Standard Model is a primary goal of research at the LHC. Recent searches by ATLAS and CMS, using data taken at a centre-of-mass energy of 8 TeV, have already probed a considerable fraction of the parameter space for a wide variety of models. The discovery reach is expected to be considerably extended at higher energy. The high-luminosity phase of upgraded LHC will provide datasets with a total integrated luminosity of about 3 ab-1, allowing ATLAS to probe new physics well beyond the reach of the first 0.3 ab-1 of 14 TeV running. In this talk, the prospects of ATLAS searches for new heavy bosons, dark matter candidates, inclusive strong production of squarks and gluinos, direct production of 3rd generation squarks and weak production of electro-weakinos at the 14 TeV LHC are presented. The results make use of parametrisations of the expected performance of the LHC for the first 0.3 ab-1 of 14 TeV running and for the high-luminosity phase.
        Speaker: Dr. Frederik Ruehr (University of Freiburg)
        Slides
      • 12:30
        Prospects for BSM searches at the high-luminosity LHC with the CMS detector 15m
        Aspects of the Supersymmetry & other BSM search programme for the High Luminosity LHC are discussed. These include the expected discovery reach for strongly and weakly interacting Susy particles. We also discuss some example measurements the HL-LHC will allow if evidence of new physics is found during Run 2 or Run 3 of the LHC.
        Speaker: Dr. Lesya Shchutska (Univ. of Florida, United States)
        Slides
      • 12:45
        Discovering Supersymmetry and Dark Matter at the International Linear Collider 15m
        Although the LHC experiments have put strong limits on coloured supersymmetric states, it is still possible that electroweakly interacting supersymmetric particles have masses in the range 100-200 GeV. Even outside of supersymmetry, candidates for the particle of dark matter may have masses in this range unconstrained by LHC data. In e+e- annihilation, the low backgrounds, precise knowledge of the initial-state beams, and sensitivity to small energy depositions provides discovery potential complementary to the LHC, for instance in cases with small mass differences. This contribution will report the current status of studies for the prospects of measurements of WIMPs, Higgsinos and other light electroweak states at the International Linear Collider, with results based on simulation of the detectors proposed for the ILC.
        Speaker: Dr. Mikael Berggren (DESY)
        Slides
      • 13:00
        Prospects for Beyond Standard Model Physics at CLIC 15m
        The Compact Linear Collider (CLIC) is an attractive option for a future multi-TeV linear electron-positron collider. A staged construction in several centre-of-mass energy steps from a few hundred GeV up to 3 TeV is foreseen. At high energies, CLIC provides sensitivity to a wide range of phenomena beyond the Standard Model through direct observation of new particles and precision measurements. An overview of these opportunities is given in this presentation. CLIC is in particular well suited for the measurement of weakly interacting states due to the clean experimental conditions and low backgrounds compared to hadron colliders. Most studies are based on full detector simulations using Geant4 and considering pileup from gamma gamma to hadrons interactions. The production of supersymmetric particles like sleptons and gaugions was studied in detail in several different models. The scenarios discussed in this presentation include an extended Higgs sector, Z' physics and other models.
        Speaker: Dr. Philipp Roloff (CERN)
        Slides
      • 13:15
        Search for rare phenomena at FCC-ee 15m
        As part of the Future Circular Collider study at CERN, the Future e+e- Circular Collider, FCC-ee, (formerly called TLEP) is a new generation collider, able to fit in a 80 to 100km tunnel, and able to deliver high luminosity in up to four interaction points from at least the Z peak to above the top pair threshold. Statistics of 1012 Z, 108 W pairs, 2 106 ZH events, and 106 top pairs can be contemplated. The search for rare phenomena will be discussed, including in particular: flavor changing neutral currents, violations of universality, invisible and exotic Higgs and Z decays, and the possibility to discover the existence of heavy sterile neutrinos.
        Speaker: Maurizio Pierini (CERN)
        Slides
    • 11:30 → 13:30
      Detector RD and Performance Auditorium 3B ()

      Auditorium 3B

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Francesco Forti (University and INFN, Pisa)
      • 11:30
        CMS Trigger Improvements towards Run II 20m
        The trigger systems of the LHC detectors play a crucial role in determining the physics capabilities of the experiments. A reduction of several orders of magnitude of the event rate is needed to reach values compatible with detector readout, offline storage and analysis capability. The CMS experiment has been designed with a two-level trigger system: the Level-1 Trigger (L1T), implemented on custom-designed electronics, and the High Level Trigger (HLT), a streamlined version of the CMS offline reconstruction software running on a computer farm. Both systems need to provide an efficient and fast selection of events, to keep the average write-out rate below 450Hz. For Run II, the doubling of both the center of mass energy to 13 TeV and the collision rate to 40 MHz, will imply increased cross sections and out-of-time pile-up. We will present the improvements brought to both L1T and HLT strategies to meet those new challenges.
        Speaker: Dr. Darin Acosta (Univ. of Florida, United States)
        Slides
      • 11:50
        Towards a Level-1 tracking trigger for the ATLAS experiment 20m
        Plans for a physics-driven upgrade of the LHC foresee staged increases of the accelerator's average instantaneous luminosity, of up to a factor of five compared to the original design. In order to cope with the sustained luminosity increase, and the resulting higher detector occupancy and particle interaction rates, the ATLAS experiment is planning phased upgrades of the trigger system and of the DAQ infrastructure. In the new conditions, maintaining an adequate signal acceptance for electro-weak processes will pose unprecedented challenges, as the default solution to cope with the higher rates would be to increase thresholds on the transverse momenta of physics objects (leptons, jets, etc). Therefore the possibility to apply fast processing at the first trigger level in order to use tracking information as early as possible in the trigger selection represents a most appealing opportunity, which can preserve the ATLAS trigger's selectivity without reducing its flexibility. Studies to explore the feasibility of the new trigger component are ongoing and are developing in two directions: the definition of a fast readout for high-granularity silicon detectors, and the development of fast pattern-recognition algorithms to be applied immediately after the front-end readout of relevant sub-detectors. The status of ongoing tests and preliminary results for the system under development are discussed.
        Speaker: Prof. Antonella De Santo (Univ. of Sussex (UK))
        Slides
      • 12:10
        Highly granular digital electromagnetic Calorimeter with MAPS 20m
        A highly granular digital electromagnetic calorimeter has been built using MAPS/MIMOSA23 with 30 micron pixel size to prove the feasibility of the proposed Forward electromagnetic Calorimeter (FoCal) as a possible upgrade of the ALICE apparatus. The physics motivations of such a project are presented together with the calorimeter performance in several test beam campaigns. We show the energy resolution, longitudinal and lateral profile and compare the experimental values with the simulations in the energy range from 2 to 200 GeV.
        Speaker: Dr. Elena Rocco (Nikhef)
        Slides
      • 12:30
        Strategies for using GAPDs as tracker detectors in future linear colliders 20m
        After the recent discovery of the Higgs boson, refined measurements need to be done to unravel the properties of the new particle with high precision. These measurements will be performed in great part at future linear colliders, namely the International Linear Collider (ILC) and the Compact LInear Collider (CLIC). Nevertheless, the physics goals at the mentioned facilities impose such extreme requirements on detector systems that exceed those met by any previous technology. Amongst others, Geiger-mode Avalanche PhotoDiode (GAPD) detectors are being developed to track high energy particles at the next generation of particle colliders. GAPDs offer outstanding qualities to meet the severe specifications of ILC and CLIC, such as an extraordinary high sensitivity, virtually infinite gain and ultra-fast response time, apart from compatibility with standard CMOS processes. In particular, GAPD detectors enable the direct conversion of a single particle event onto a CMOS digital pulse within the sub-nanosecond time scale. As a result, GAPDs can be read out after each single bunch crossing, a unique feature that none of its competitors can offer at the moment. In spite of all these advantages, GAPD detectors suffer from two main problems, specifically the inherently generated noise pulses and the low fill-factor. The noise pulses worsen the detector occupancy, while the low fill-factor reduces the detection efficiency. In this work, solutions to the two problems commented that are compliant with the severe specifications of the future linear colliders have been thoroughly investigated. In particular, we will present the design and characterization, including the results of a beam-test campaign, of a prototype GAPD pixel detector in a standard CMOS process. The prototype is operated in the time-gated mode to fit the occupancy requirement. In addition, the design of a GAPD pixel detector in a 3D process to overcome the fill-factor limitation will also be discussed in detail. The 3D GAPD detector shows the maximum fill-factor ever reported with this sensor technology.
        Speaker: Dr. Eva Vilella (University of Barcelona)
        Slides
      • 12:50
        The Mu2e Straw Tube Tracker and Crystal Calorimeter of the Mu2e Experiment 20m
        The Mu2e experiment will search for neutrinoless conversion of muons into electrons in the field of an aluminum nucleus. The signature of this process is a 105 MeV electron. Precise and robust measurement of the outgoing electron momentum, along with powerful background rejection, are essential elements of the experiment. We describe the unique features of the low-mass straw tube tracker and the crystal calorimeter that meet these stringent requirements. The tracking and calorimeter systems must operate in a vacuum and a 1 Tesla magnetic field. The tracker consists of about 20,000 thin-wall Mylar straws held under tension to avoid the need for supports within the active volume. In addition to measuring distance from the wire by drift time, subnanosecond measurement of signal propagation time is used to measure position along the wire. Charge will be measured using ADCs to provide particle identification capability. The calorimeter confirms the identity of conversion electrons found in the tracker, aids in track reconstruction by providing a seed cluster, and, using timing and E/p information, rejects cosmic ray muons that evade the cosmic ray veto system. The calorimeter consists of two disks, each containing 930 crystals of barium fluoride (BaF2). The readout of the fast scintillation component of BaF2 at 220 nm will be done with high efficiency by a large area UV-sensitive APD that incorporates an interference filter to discriminate against the more intense slow scintillation component at 300nm.
        Speaker: Prof. David Hitlin (Caltech)
        Slides
    • 11:30 → 13:15
      Flavour Physics Sala 3+4 ()

      Sala 3+4

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Prof. Ahmed Ali (DESY)
      • 11:30
        Semileptonic and leptonic B and $B_s$ decays at Belle 15m
        Semileptonic B meson decays, $B \to X \ell \nu$, are currently the preferred modes for determining the Cabibbo-Kobayashi-Maskawa (CKM) matrix elements $|V_{cb}|$ and $|V_{ub}|$, two fundamental parameters of the Standard Model. At the same time they can also be used to test and refine the theoretical tools used for describing B mesons and their decays. Purely leptonic B meson decays, $B \to \ell \nu$, are helicity-suppressed in the SM, and while more challenging for the extraction of the CKM matrix elements, they are excellent probes of models beyond the SM. The decay $B \to \mu \nu$ is at the edge of the sensitivity of current experiments, while $B \to e \nu$ will remain inaccessible to the next generation of experiments in the SM. Based on the large data sample accumulated by the Belle experiment at the KEKB asymmetric energy $e^+ e^-$ collider at KEK, Japan, we present new results on semileptonic and leptonic $B_{(s)}$ meson decays.
        Speaker: Mr. Robin Glattauer (HEPHY Vienna)
        Paper
        Slides
      • 11:45
        The inclusive determination of Vcb 15m
        We perform a new fit to the moments of various kinematic distributions of inclusive semileptonic B decays, including recently computed higher order effects, and extract Vcb and the parameters of the heavy quark expansion.
        Speaker: Dr. Kristopher Healey (University of Turin)
        Slides
      • 12:00
        Semileptonic decays at LHCb 15m
        LHCb has recorded large samples of semileptonic decays of c- and b-flavoured hadrons. We review the latest results in semileptonic decays of B, Bs and Λb decays. Recent results on CP violation and determination of CKM matrix elements are shown.
        Speaker: Dr. Brian Hamilton (University of Maryland)
        Slides
      • 12:15
        Higher order corrections to inclusive semileptonic B decays 15m
        We review the status of the calculation of higher order corrections to inclusive semileptonic B decays, with emphasis on recent developments concerning the perturbative corrections to power suppressed effects and their impact on the determination of Vcb.
        Speaker: Andrea Alberti (University of Turin)
        Slides
      • 12:30
        Exclusive semileptonic B decays to high-mass charm hadrons 15m
        The experimental knowledge of semileptonic B decays to a D or D* meson with one or more pions is limited. These limitations are relevant to two experimental puzzles: the tension between the values of Vcb determined from inclusive and exclusive semileptonic decays, and the gap between the sum of the exclusive semileptonic B decays to charm and the inclusive b -> c l nu rate.  The full BABAR data set is used to improve the precision on decays involving D(*) pi l nu and to search for decays of the type D(*) pi pi l nu.  Fully-reconstructed hadronic B decays are used to tag events and provide good resolution on the discriminant variable U = E_{miss}-P_{miss}. A simultaneous fit to charged and neutral B decays to D(n\pi) and D*(n\pi) decays is used to extract relative branching fractions.  In addition to studying these high mass charm final states, the data are used to determine a precise measurement of the ratio of branching fractions for B -> D l nu / B -> D* l nu.
        Speaker: Dr. Thomas Lück (University of Victoria)
        Slides
      • 12:45
        Towards a quantitative understanding of the $D\to \pi$ and $B\to \pi$ semileptonic decays 15m
        The charm semileptonic decay $D \to \pi e \nu$ has been measured by several experiments. Conversely to other semileptonic decays, this channel presents the interest that contributions from the two first poles can be predicted. We have computed accurately in LQCD the ratio of decay constants $f_{D^\ast}/f_D$ making the evaluation of the $D^\ast$-pole contribution quite accurate. Measurements of the above charm semileptonic decay have been analyzed using a model with $3$ poles, the last one being effective. It is found that data agree with the superconvergence condition according to which the sum of the residues at the various poles amounts to zero. This analysis is extended to $B\to \pi e \nu$ decays for which we compute the ratio $f_{B^\ast}/f_B$. We find that both decays verify the superconvergence condition which also assures validity of the heavy quark scaling law in the large recoil limit. We then verify that the value of $V_{ub}$ we extract from a comparison with the experimental data is consistent with those previously found from the exclusive semileptonic decays.
        Speaker: Dr. Arantza Oyanguren (IFIC- Valencia)
        Slides
      • 13:00
        A new way to search for right-handed currents in semileptonic $B \to \rho \ell \bar\nu$ decay 15m
        There exist a long standing tension among determinations of the CKM matrix element $|V_{ub}|$ from various (semi)leptonic $B$ decay channels with varying significance of up to $\sim 3\sigma$. An interesting possibility to ease this tension is to allow for a right-handed contribution to the standard model left-handed weak current mediating the $b\rightarrow u$ quark decay. The current bounds on such a contribution are fairly weak. We propose a new way to search for such a right-handed current in semileptonic $B$ meson decay to $\rho$ mesons. We describe a new variable that we propose, and discuss the theoretical uncertainties. Especially we investigate the uncertainties and their correlations among all contributing form factors with the assumed $z$-expansion for its shape, valid over the whole $q^2$ range. Then we study the achievable sensitivity both from the available Babar and Belle data sets, as well as from an anticipated $50\,{\rm ab}^{-1}$ at Belle~II.
        Speaker: Mr. Sascha Turczyk (University of Mainz)
        Slides
    • 11:30 → 13:30
      Formal Theory Developments Sala 8+9 ()

      Sala 8+9

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Dr. Esperanza Lopez (Instituto de Fisica Teorica-UAM/CSIC)
      • 11:30
        On the smallness of the cosmological constant in SUGRA models with Planck scale SUSY breaking and degenerate vacua 30m
        In $N=1$ supergravity (SUGRA) supersymmetric (SUSY) and non-supersymmetric Minkowski vacua originating in the hidden sector can be degenerate. This allows for consistent implementation of the multiple point principle (MPP) assumption. We present no--scale inspired SUGRA model where the MPP assumption is realised at the tree--level without extra fine-tuning. In the supersymmetric phase in flat Minkowski space SUSY may be broken dynamically inducing tiny vacuum energy density which can be assigned, by virtue of MPP, to all other phases including the one in which we live. We argue that the measured value of the cosmological constant, as well as the small values of quartic Higgs self--coupling and the corresponding beta function at the Planck scale, which can be obtained by extrapolating the Standard Model (SM) couplings to high energies, can originate from supergravity (SUGRA) models with degenerate vacua. This scenario is realised if there are at least three exactly degenerate vacua. In the first vacuum, associated with the physical one, local supersymmetry (SUSY) is broken near the Planck scale while the breakdown of the $SU(2)_W\times U(1)_Y$ symmetry takes place at the electroweak (EW) scale. In the second vacuum local SUSY breaking is induced by gaugino condensation at a scale which is just slightly lower than $\Lambda_{QCD}$ in the physical vacuum. Finally, in the third vacuum local SUSY and EW symmetry are broken near the Planck scale.
        Speaker: Dr. Roman Nevzorov (University of Adelaide)
        Slides
      • 12:00
        Calculating repetitively.III: 30m
        This talk has two highlights: a. The utility of the Dirac δ – function as an aid to repetitive integration in multiple integrals, and b. An extension to 3 + 1 dimensional stationary curved space of a recent effort by the author in 2 + 1 dimensional stationary curved space to determine the zeta function for the Lagrangian density for a real massive scalar field using the Schwinger operator expansion; this is a reworking to advantage by the author of the Antonsen – Bormann idea that was originally proposed by these latter authors for the computation of the heat kernel in curved space. The repetitive nature of the calculation in 2 + 1 dimensional curved space at all higher orders(≥3) in the gravitational constant G suggested the use of the Dirac delta-function and one of its integral representations – in that it is convenient to obtain answers, so its utility is also checked in the 3 + 1 dimensional case.
        Speaker: Prof. Gopinath Kamath (Indian Institute of Technology Madras)
        Slides
      • 12:30
        Vacuum instability in holography 30m
        We analyze vacuum instability of strongly coupled gauge theories in a constant electric field using AdS/CFT correspondence. The model is the N = 2 1-flavor supersymmetric large Nc QCD in the strong ’t Hooft coupling limit. We calculate the Euler-Heisenberg effective Lagrangian L(E), which encodes the nonlinear response and the quantum decay rate of the vacuum in a background electric field E, from the complex D-brane action in AdS/CFT. We find that the decay rate given by ImL(E) becomes nonzero above a critical electric field set by the confining force between quarks. A large E expansion of Im L(E) is found to coincide with that of the Schwinger effects in QED, replacing its electron mass by the confining force.
        Speaker: Prof. Koji Hashimoto (Osaka university / RIKEN)
        Slides
      • 13:00
        N=2 SUGRA BPS Multi-center solutions, quadratic prepotentials and Freudenthal transformations 30m
        We present a detailed description of $N=2$ stationary BPS multicenter black hole solutions for quadratic prepotentials with an arbitrary number of centers and scalar fields making a systematic use of the algebraic properties of the matrix of second derivatives of the prepotential, $\mathcal{S}$, which in this case is a scalar-independent matrix. In particular we obtain bounds on the physical parameters of the multicenter solution such as horizon areas and ADM mass. We discuss the possibility and convenience of setting up a basis of the symplectic vector space built from charge eigenvectors of the $\ssigma$, the set of vectors $(\Ppm q_a)$ with $\Ppm$ $\ssigma$-eigenspace projectors. The anti-involution matrix $\mathcal{S}$ can be understood as a Freudenthal duality $\tilde{x}=\ssigma x$. We show that this duality can be generalized to ``Freudenthal transformations'' $$x\to \lambda\exp(\theta \ssigma) x= a x+b\tilde{x}$$ under which the horizon area, ADM mass and intercenter distances scale up leaving constant the scalars at the fixed points. In the special case $\lambda=1$, ``$\ssigma$-rotations'', the transformations leave invariant the solution. The standard Freudenthal duality can be written as $\tilde x= \exp\left(\frac{\pi}{2} \ssigma\right) x .$ We argue that these generalized transformations leave invariant not only the quadratic prepotential theories but also the general stringy extremal quartic form $\Delta_4$, $\Delta_4(x)= \Delta_4(\cos\theta x+\sin\theta\tilde{x})$ and therefore its entropy at lowest order.
        Speaker: Dr. torrente-lujan emilio (universidad de murcia)
        Slides
    • 11:30 → 13:30
      Heavy Ions Sala 2 ()

      Sala 2

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Dr. Elena Gonzalez Ferreiro (Universidade de Santiago de Compostela)
      • 11:30
        Jets and high-pT probes of the QGP measured by the ALICE experiment 20m
        Hard-scattered partons are produced early in heavy-ion collisions, prior to the formation of the strongly interacting nuclear medium, the quark-qluon plasma (QGP). These partons lose energy as they traverse the medium and eventually fragment into jets, which exhibit a modification when compared to jets produced in pp collisions. Large transverse momentum (pT) particles, which are proxies for jets, and inclusive jets are suppressed in heavy-ion collisions at both RHIC and the LHC. Di-hadron correlation measurements have shown that the parton fragmentation is modified by the medium. At LHC energies the parton production cross-section is much larger than at RHIC, allowing jets to be reconstructed over a much wider kinematic range. Such measurements provide the possibility for a differential investigation of the parton energy loss. The ALICE experiment at LHC, with its powerful tracking and particle identification capabilities and calorimetric systems, performs measurements of high-pT particles, jets (composed of charged or charged plus neutral particles) as well as their correlations. The calorimeters are used as trigger detectors and extend the measurable pT range for such probes. In this talk, a summary of the recent results of the ALICE experiment on the measurement of high-pT particles, jets and high-pT di-hadron/hadron-jet correlations in pp, p-Pb and Pb-Pb collisions at the LHC between years 2010 and 2013 will be shown. Pb-Pb and p-Pb measurements will be compared to the pp baseline measurements to determine the effect of the QGP (Pb-Pb) or the initial cold nuclear matter (p-Pb).
        Speaker: Mr. Gustavo Conesa Balbastre (LPSC-CNRS)
        Slides
      • 11:50
        Jets and high-pT probes of the QGP in CMS 20m
        Jet studies provide experimental means to explore the details of parton-medium coupling and the energy loss mechanisms in QCD matter. In this talk an overview of recent jet and high-pT measurements from 2.76 TeV PbPb and pp collisions with the CMS detector will be presented. Additionally, the latest CMS jet results from pPb collisions at 5.02 TeV will be discussed in the context of initial state effects in jet measurements.
        Speaker: Dr. Garberson Pelin Kurt (Univ. of Illinois at Chicago, United States)
        Slides
      • 12:10
        Measurement of Hard Probes of the Quark-Gluon Plasma with the ATLAS Experiment at the LHC 20m
        Jets provide a powerful tool for probing the dynamics of the quark-gluon plasma created in Pb+Pb collisions at the LHC. The modification of high-pT parton showers as they propagate in the quark-gluon plasma, often referred to as "jet quenching", provides insight on the short-distance dynamics of the plasma. Jet quenching has been observed in a variety of single jet, dijet, and photon-jet measurements at the LHC as well as in measurements of modified charged-particle fragmentation functions. These results will be presented along with a survey of results of control measurements using electroweak final states in Pb+Pb collisions and jet production in proton-lead collisions.
        Speaker: Dr. Barbara Krystyna Wosiek (Polish Academy of Sciences (Poland))
        Slides
      • 12:30
        The onset of the ridge structure in AA, pA and pp collisions. 20m
        It is shown that the anomalous sharp increasing of the strength of the near-side ridge structures observed in Au-Au collisions at \sqrt{s} = 62 GeV and \sqrt{s} = 200 GeV and the onset of the ridge structure in pPb and in pp collisions can be naturally explained in the framework of string percolation. In all the cases the near-side strength reflects the collision area covered by the strings stretched between the colliding objects and therefore it is related to the shape of their profile functions. The dependence of the pseudorapidty and azimuthal widths on multiplicty and energy is qualitatively explained.
        Speaker: Mr. Alexis Moscoso Rial (Universidade de Santiago de Compostela)
        Slides
      • 12:50
        Remarks on the U(1) axial symmetry and the chiral transition in QCD at finite temperature 20m
        We discuss the role of the U(1) axial symmetry for the scalar and pseudoscalar meson mass spectrum of QCD at finite temperature, above the chiral transition at T_c, using a chiral effective Lagrangian model, which, in addition to the usual chiral condensate, also includes a (possible) genuine U(1)_A-breaking condensate that (possibly) survives across the chiral transition. The motivations for considering this Lagrangian (and a critical comparison with other effective Lagrangian models existing in the literature) are presented. A detailed comparison between the case N_f=3 (or N_f>3) and the (remarkably different) case N_f=2 is performed. The results obtained in the case N_f=2 are also critically compared with the available lattice results.
        Speaker: Dr. Enrico Meggiolaro (University of Pisa (ITALY))
        Slides
    • 11:30 → 13:30
      Lattice QCD Sala 6+7 ()

      Sala 6+7

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      • 11:30
        Inclusion of isospin breaking effects in lattice simulations 30m
        Isospin symmetry is explicitly broken in the Standard Model by the non-zero differences of mass and electric charge between the up and down quarks. Both of these corrections are expected to have a comparable size of the order of one percent relatively to hadronic energies. Although these contributions are small, they play a crucial role in hadronic and nuclear physics. We explain how to properly define QCD and QED on a finite and discrete space-time so that isospin corrections to hadronic observables can be computed ab-initio. We then consider the different approaches to compute lattice correlation functions of QCD and QED observables. Finally we summarise the actual lattice computations which include isospin breaking effects.
        Speaker: Dr. Antonin Portelli (University of Southampton)
        Slides
      • 12:00
        Lattice QCD studies of the leading order hadronic contribution to the muon g-2 30m
        The anomalous magnetic moment of the muon, g-2, is one of the most promising observables to identify the signs of physics beyond the Standard Model. QCD contributions are currently responsible for the largest fraction of the overall theoretical uncertainty in the determination of the muon g-2, and in the running of the QED coupling constant. Studies of the vacuum polarisation function and of the Adler function, currently being carried out by the Mainz lattice group, will be presented. The various systematic effects present in the lattice QCD determinations of the muon g-2 and of the running of the QED coupling will be discussed.
        Speaker: Gregorio Herdoiza (KPH Mainz & IFT Madrid)
        Slides
      • 12:30
        Progress of lattice calculation of light-by-light contribution to muon g-2 20m
        I would like to present current progress of lattice calculation of muon g-2 for light-by-light contribution. We forcus on the lattice calculation of non-perturbative contribution to neutral pion to two-photon decay transition form factor in light-by-light diagram. In this talk I will also compare with the direct computation in QED+QCD lattice simulation.
        Speaker: Dr. Eigo Shintani (Mainz Univ.)
        Slides
      • 12:50
        The strange and charm quark contributions to the anomalous magnetic moment of the muon from lattice QCD 20m
        We describe a new technique (presented in arXiv:1403.1778) to determine the contribution to the anomalous magnetic moment of the muon coming from the hadronic vacuum polarization using lattice QCD. Our method uses Padé approximants to reconstruct the Adler function from its derivatives at q^2=0. These are obtained simply and accurately from time-moments of the vector current-current correlator at zero spatial momentum. We test the method using strange quark correlators calculated on MILC Collaboration's n_f = 2+1+1 HISQ ensembles at multiple values of the lattice spacing, multiple volumes and multiple light sea quark masses (including physical pion mass configurations). We find the (connected) contribution to the anomalous moment from the strange quark vacuum polarization to be a^s_μ=53.41(59)×10^(−10), and from charm to be a^c_μ=14.42(39)×10^(−10) - 1% accuracy is achieved for the strange quark contribution. The extension of our method to the light quark contribution and to that from the quark-line disconnected diagram is straightforward.
        Speaker: Dr. Jonna Koponen (University of Glasgow)
        Slides
    • 11:35 → 13:30
      Strong Interactions and Hadron Physics: Jets III + Minimum bias / soft QCD Sala 1 ()

      Sala 1

      Allocated time include time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Conveners: Daniel de Florian de Florian (Universidad de Buenos Aires), Dr. Ulla Blumenschein (Goettingen university)
      • 11:35
        NLO + Parton Showers merging: current status and future perspectives 25m
        I will summarize the current status of Monte Carlo tools used for LHC phenomenology and highlight the most recent developments in the field, with a particular focus on the progress made towards a consistent inclusion of higher-order perturbative terms in the simulations.
        Speaker: Dr. Emanuele Re (University of Oxford)
        Slides
      • 12:00
        Tevatron Energy Scan: Findings & Surprises 15m
        We present results from a recent CDF study of min-bias collisions (MB) and the "underlying event" (UE) using charged particles produced in proton-antiproton collisions at 300 GeV, 900 GeV, and 1.96 TeV. The 300 GeV and 900 GeV data are a result of the "Tevatron Energy Scan" which was performed just before the Tevatron was shut down. The direction of the leading charged particle in each event, PTmax, is used to define three regions of eta-phi space; "toward", "away", and "transverse". The "transverse" region is further divided into the "transMAX" and "transMIN" contributions. The "transMIN" region is very sensitive to the MPI & BBR components of the UE, while the "transDIF" region ("transMAX" minus "transMIN") is more sensitive to the ISR & FSR. The data are corrected to the particle level and are compared with LHC data at 900 GeV and 7 TeV. This CDF analysis together with LHC UE data provides detailed information about the energy dependence of the various components of the UE which tests the UE models and constrain their parameters, allowing for more precise predictions at 13 TeV and 14 TeV.
        Speaker: Prof. Rick Field (Florida)
        Slides
      • 12:15
        Soft QCD, Minimum bias and UE measurements at ATLAS 15m
        Particle distributions sensitive to the underlying event in proton-proton collisions have been measured with the ATLAS detector at the LHC at 7 TeV centre-of-mass energy. Various and complementary measurements are presented, e.g. charged particle multiplicity, charged and inclusive sum transverse momentum densities and mean charged-particle transverse momentum in the regions of each event, azimuthally transverse to the hardest jet or Z boson directions. When compared to the predictions of different Monte Carlo models, the data show sensitivity to modelling of the underlying event. An explicit study of double-parton scattering using W+dijet events is presented, along with a measure of the effective cross section. In addition the high-energy pp collisions at the LHC provide unique opportunity to study particle flow and event shapes of the hadronic final state particles. Evolution of the event shape variables, such as the transverse thrust, thrust minor and transverse sphericity have been studied for minimum bias events as a function of momentum scale. Bose-Einstein correlations provide a unique opportunity for detailed understanding of the space-time geometry of the hadronization region, for determining the size and shape of the source from which particles are emitted and for interpreting of quark confinement effects. Bose-Einstein correlation lead to an enhancement of the production of identical bosons close in phase space. The ATLAS collaboration has performed a measurement of Bose-Einstein correlations of the pairs of charged particles with transverse momentum greater than 100 MeV in p-p collisions at 900 GeV and 7 TeV. Bose-Einstein correlation parameters are investigated up to very high charged-particle multiplicities. The dependence of the BEC parameters on the average transverse momentum per pair and per particle is also investigated.
        Speaker: Dr. Oleg Zenin (IHEP Serpukhov)
        Slides
      • 12:30
        Matching NLO with parton shower in Monte Carlo scheme 15m
        I will discuss a new method of including NLO QCD corrections to the hard process in the LO Monte Carlo (MC) shower. The method is based on the recently proposed MC factorization scheme, which dramatically simplifies the NLO coefficient functions. The NLO corrections are introduced by a simple reweighing of the events produced by the LO shower, with a single, positive MC weight. I will show a practical implementation of the method for the case of electro-weak boson production in the hadron-hadron collision and compare it with the well established approaches to NLO+PS matching. I will advocate the theoretical and practical advantages of the new method. I will also briefly discuss the perspectives of using it to include NLO corrections in the ladder part.
        Speaker: Dr. Sebastian Sapeta (CERN)
        Slides
      • 12:45
        Minimum Bias, MPI and DPS, and Diffractive and Exclusive measurements at CMS and TOTEM 15m
        We present recent results on Minimum Bias, MPI and DPS, and Diffractive and Exclusive studies using data collected during Run 1 of the LHC. The measurements include data collected in p-p collisions at sqrt(s) = 2.76, 7, and 8 TeV by the CMS and TOTEM collaborations. Double parton scattering is investigated in several final states including vector bosons and jets, and the effective cross section results are compared to other experiments and to MPI models tuned to recent underlying event measurements at CMS. Inclusive diffractive cross sections are discussed and compared to models, while searches and measurements of central exclusive processes are presented. The results from the first combined measurement by the CMS+TOTEM collaborations of the pseudorapidity distribution of charged particles at 8 TeV are also discussed, and are compared to models and to lower energy measurements.
        Speaker: Dr. Dipanwita Dutta (Scientist and Associate Professor, Bhabha Atomic Research Centre, Mumbai)
        Slides
      • 13:00
        Measurement of the total cross section of pp collisons at sqrt(s)=7 TeV from elastic scattering with the ATLAS detector 15m
        The ATLAS measurement of the total p-p cross section at the LHC at sqrt(s)= 7 TeV is presented. In a special LHC run with high betastar beam optics corresponding to an integrated luminosity of 80 inverse microbarn the elastic scattering process is measured in the range of the momentum transverse t from -t=0.0025 GeV^{2} to -t=0.38 GeV^{2} with the ALFA detector of ATLAS. From the extrapolation of the differential elastic cross section to t=0 GeV^2 using the optical theorem the total cross section sigma(pp->X) is extracted with the luminosity-dependent method. In addition the nuclear slope of the elastic t-spectrum, the total elastic and inelastic cross sections are determined.
        Speaker: Dr. Hasko Stenzel (Giessen University)
        Paper
        Slides
      • 13:15
        Soft QCD measurements at LHCb 15m
        Its forward acceptance puts the LHCb in a unique position at the LHC to measure soft QCD phenomena at large rapidities and low transverse momenta. Recent results on charged particle multiplicity production, energy flow, and inclusive cross-sections are presented.
        Speaker: Dr. Dmytro Volyanskyy (Max-Planck-Institut für Kernphysik)
        Slides
    • 13:30 → 15:00
      Lunch 1h 30m
    • 15:00 → 17:30
      Accelerator Physics and Future Colliders: session 4 Sala 6+7 ()

      Sala 6+7

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Dr. Toshiaki Tauchi (High Energy Accelerator Reserach Organization, KEK)
      • 15:00
        Design to Realization of the International Linear Collider: ILC 25m
        The International Linear Collider (ILC) has been proposed for a next generation, energy frontier, e+e- colliding accelerator. The Technical Design Report (TDR) was published in 2013, and the project is getting into the transition of the "Design to Realization" stage. The report will describe the ILC accelerator design and technology as well as future prospect of the project anticipated to be hosted in Japan and to be realized with a global cooperation project.
        Speaker: Prof. Akira Yamamoto (KEK/CERN)
        Slides
      • 15:25
        The CLIC project, status and prospects 25m
        The Compact Linear Collider (CLIC) project explores the possibility of constructing a future multi-TeV linear electron-positron collider for high energy frontier physics post LHC. The CLIC-concept is based on high gradient normal-conducting accelerating structures. The RF power for the acceleration of the colliding beams is produced by a two beam acceleration scheme, where power is extracted from a high current drive beam that runs parallel with the main linac. The key ongoing studies cover accelerator parameter optimisation, technical studies and component development, alignment and stability including a number of system performance studies in test-facilites around the world. The CLIC physics potential and main detector issues, as well as possible implementation stages are being studied in parallel. A summary of the progress and status of the corresponding studies will be given, as well as an outline of the preparation and work towards developing a CLIC implementation plan by 2018.
        Speaker: Prof. Steinar Stapnes (CERN)
        Slides
      • 15:50
        ATF2 for final focus test beam for future linear colliders 25m
        International Linear Collider( ILC ) adopt local chromaticity correction scheme in the final focus system. ATF2 is a project to test the performance of the ILC final focus system experimentally. A new test beam line was constructed downstream of ATF Damping Ring( DR ) in KEK in 2008. Though the energy is as low as 1.3GeV while 250 GeV for the ILC, low emittance beam is available from the DR. The optics is designed by scaling ILC optics, and the goal of the beam size is about 40nm. In this talk, the recent results of the study is reported.
        Speaker: Dr. Shigeru KURODA (KEK)
        Slides
      • 16:15
        Fast beam-collision feedbacks for luminosity optimisation at next-generation lepton colliders 15m
        Future lepton colliders such as the International Linear Collider (ILC), and the Compact Linear Collider (CLIC) require nanometer-sized beams at the interaction point (IP). We report on the design, protoyping and testing of beam-based feedback systems for steering the beams into collision at the IP so as to maximise the luminosity performance of the colliders. Both all-analogue and digital feedback prototypes have been built and tested for CLIC and ILC, respectively. The latency of such systems needs to be very low so as to match the bunch spacing and bunch-train length. We report on the achievement of systems with 130ns and 23ns latency that meet the beam position resolution and beam kick requirements of both ILC and CLIC, respectively; the prototypes were tested with ILC- and CLIC-like beams at the Accelerator Test Facility at KEK. We have simulated the measured performance and demonstrated the potential of the feedbacks to compensate for ground-motion disruption and recover almost all of the design luminosity.
        Speaker: Prof. Philip Burrows (Oxford University)
        Slides
      • 16:30
        Gauging the impact of IP beam-beam fields on the physics program of future linear colliders 15m
        Interaction point (IP) beam parameters at future linear colliders have been chosen in order to limit the impact of non-linear effects from strong electromagnetic fields at the IP. However the field strength experienced by incoming particles is still a significant percentage of the field strength that polarises the vacuum. These vacuum changes can be taken into account at Lagrangian level via the Furry picture. Until now, Furry picture calculations have been limited to first order processes, namely the beamstrahlung and coherent pair production. However there is a need, especially for precision physics requirements, to extend the analysis to higher order processes. I survey the theoretical efforts underway to apply this strong field analysis to collider processes in general, including new particle wavefunctions in overlapping bunch fields, recalculations of physics cross-sections, a new strong field event generator and proposed strong-field experimental tests in the extraction line of a future linear collider.
        Speaker: Dr. Anthony Hartin (DESY)
        Slides
      • 16:45
        Prospects of high energy photon colliders 15m
        High energy photon colliders (γγ,γe) based on Compton scattering of laser photons on high energy electrons are considered for many years as a natural option for e+e- linear colliders. Photon colliders can study New Physics at energies and statistics similar to those in e+e−collisions—but in different reactions. In some cases, photon colliders provide access to higher masses or allow the study of some phenomena with higher precision. They do not need positron and damping rings are not absolutely needed as well. In addition to photon colliders at ILC and CLIC the discovery of the Higgs boson has triggered several proposals of photon collider Higgs factories based on recirculation linacs in rings (incl. HERA and Tevatron tunnels). In this talk, following a brief discuss of physics motivation, technological aspects and photon colliders based on ILC and CLIC, I give a critical overview of the recently proposed photon-collider Higgs factories.
        Speaker: Prof. Valery Telnov (Budker INP and Novosibirsk Univ.)
        Slides
      • 17:00
        Accelerator on a Chip: Recent Progress 25m
        Laser acceleration in dielectric structures offers a new approach to the next generation of accelerators. The recently demonstrated gradient of 300MeV/m is a first step toward an accelerator system with all essential elements designed to be fabricated on a chip using modern lithographic methods. Progress on beam position and the future possibilities of X-ray generation with a dielectric undulator will be discussed.
        Speaker: Prof. Robert L. Byer (Stanford University)
        Slides
    • 15:00 → 17:48
      Astroparticle Physics and Cosmology Auditorium 3A ()

      Auditorium 3A

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Prof. Graciela Gelmini (University of California, Los Angeles (UCLA))
      • 15:00
        Results from the Telescope Array Experiment 25m
        The Telescope Array (TA) is the largest ultrahigh energy cosmic ray detector in the northern hemisphere. The experiment consists of three fluorescence stations viewing the air space over a surface array of 503 scintillation counters deployed over 700 square kilometers. TA has been in operation since 2008. The most recent results from TA, including that of composition studies and search for arrival direction anisotropy, will be presented. We will also report on the progress of the new TA low energy extension (TALE).
        Speaker: Prof. Charles Jui (University of Utah, Telescope Array)
        Slides
      • 15:25
        Latest results from the Pierre Auger Observatory 25m
        The Pierre Auger Observatory is the largest cosmic ray detector ever built. It was designed to detect the highest energy particles in the Universe, and it has been taking data since 2004. Our published results range from the measurement of the flux suppression at the highest energies to limits on ultra high energy neutrinos, from limits on the flux of EeV neutrons from the galaxy to the measurement of the proton-proton cross section at 57 TeV center-of-mass energy. In this talk I will present the most recent results obtained with the Pierre Auger Observatory, and the physics motivation, potential for discoveries, and current status of the upgrades to the Observatory.
        Speaker: Prof. Mostafa Miguel (Penn State University)
        Slides
      • 15:50
        Resummed Quantum Gravity Prediction for the Cosmological Constant and Constraints on SUSY GUTS 18m
        We use our resummed quantum gravity approach to Einstein's general theory of relativity in the context of the Planck scale cosmology formulation of Bonanno and Reuter to estimate the value of the cosmological constant as $\rho_\Lambda =(0.0024 eV)^4. We show that the closeness of this estimate to experiment constrains susy GUT models. We also address various consistency checks on the calculation.
        Speaker: Prof. Bennie Ward (Baylor University)
        Paper
        Slides
      • 16:08
        Anisotropies of ultra-high energy cosmic rays diffusing from extragalactic sources 19m
        The large angular scale distribution of UHECRs is expected to become an important tool to infer CR properties in the near future, as a considerable statistics is being gathered by the Pierre Auger and TA observatories. Here we obtain the dipolar anisotropy of cosmic crays diffusing from nearby extragalactic sources. We discuss both the energy regime of spatial diffusion and the quasi-rectilinear one leading to just angular diffusion at higher energies. We obtain analytic results for the anisotropies from a single source which are validated using numerical simulations. For a scenario with a few sources in the local supercluster (with the closest source at a typical distance of few to tens of Mpc), we discuss the possible transition between the case in which the anisotropies are dominated by a few sources at energies below few EeV towards the regime in which many sources contribute at higher energies. The effect of a non-isotropic source distribution is also discussed, showing that it can significantly affect the observed dipole.
        Speaker: Dr. Silvia MOLLERACH (CONICET, Centro Atomico Bariloche)
        Slides
      • 16:27
        The high energy cosmic ray particle spectra measurements with the PAMELA calorimeter 19m
        The PAMELA apparatus is in orbit from 2006 for today. The magnetic spectrometer, being the main part of the equipment, has a finite size and as a consequence the upper limit of energy measurements with it does not exceed 1 TeV. Therefore, to extend the available energy range towards higher energies the calorimeter data should be used. With the method based on the calorimeter data the energy spectra of electrons, protons and helium at high energies have been obtained for the period 2006-2013.
        Speaker: Dr. Alexander Karelin (MEPhI)
        Slides
      • 16:46
        AMS-02 measurement of cosmic ray positrons and electrons 24m
        Origin of high energy positrons in cosmic rays remains highly uncertain. In addition to being produced in the interactions of cosmic ray nuclei with interstellar media they may be produced in nearby pulsars, in the annihilation of Dark Matter particles or in a yet unknown process. The nature of the production mechanisms are expected to influence the abundance of cosmic-ray positrons and electorns. The Alpha Magnetic Spectrometer (AMS-02) is a general purpose high-energy particle physics detector operational on the International Space Station since May 2011 to conduct fundamental physics research in space. During its unique long duration mission (about 20 years), AMS-02 will collect large amount of data of unparalleled significance to study positron flux and electron flux seperately, as well as their time-dependence and directional-dependence behavior. In this contribution, data sample collected during the first 30 months of operations will be used. We will review the analysis technique used for measuring positron flux and electron flux, as well as positron fraction extending to energies beyond the published results. Anisotropy of individual fluxes will be also discussed.
        Speakers: Mr. Valerio Vagelli (Karlsruhe Institute for Technology), Dr. Zhili Weng (Massachusetts Institute of Technology)
        Slides
      • 17:10
        Axion helioscopes update: the status of CAST & IAXO 19m
        After almost 25 years since their suggestion as a good solution to the strong CP-problem, axions remain one of the viable candidates for the Dark Matter, although still eluding detection. Most of the methods for their detection are based on their coupling to photons, one of the most promising ones being the helioscope technique. We will report on the current status of the CERN Axion Solar Telescope and the future International Axion Observatory (IAXO). Recent results from the second part of CAST phase II, where the magnet bores were filled with 3He gas at variable pressure achieving sensitivities on the axion mass up to 1.2 eV/c^2, will be presented. Currently CAST is expecting to improve sensitivity to solar axions with rest mass below 0.02 eV/c^2 after the upgrade of the X-ray detectors and with the implementation of a second X-ray optic. On the other hand IAXO, a fourth generation axion helioscope, aims at improving CAST's performance in terms of axion-photon coupling by 1-1.5 orders of magnitude. The details of its projected toroidal magnet, x-ray optics and x-ray detectors will be given.
        Speaker: Dr. Theopisti Dafni (Universidad de Zaragoza)
        Slides
    • 15:00 → 17:30
      BEH Physics: Higgs at Future Facilities Auditorium 1 ()

      Auditorium 1

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Dmitri Denisov (Fermilab)
      • 15:00
        Prospects for Higgs physics with an upgraded CMS detector at the high-luminosity LHC 20m
        Projections for the expected performance of an upgraded CMS detector are presented for various Higgs property measurements planned for the high luminosity running period of the LHC.
        Speaker: Dr. Seth Conrad Zenz (Imperial College London)
        Slides
      • 15:20
        ATLAS Higgs physics prospects at the high luminosity LHC 20m
        Run-I at the LHC has been very successful and included the discovery of a new particle with mass of about 125 GeV compatible within uncertainties with the Higgs boson predicted by Standard Model. In this talk, the Higgs physics prospects at the high-luminosity LHC are presented, assuming an energy sqrt(s) = 14 TeV and a data sample of 3 ab-1. In particular, the ultimate precision attainable on the couplings measurements of the 125 GeV particle with elementary fermions and bosons is discussed, as well as perspectives on the searches for partners associated to this new object, predicted by several extensions of the standard theory.
        Speaker: Dr. Reina Camacho (Université de Genève)
        Slides
      • 15:40
        Higgs Physics at CLIC 15m
        The Compact Linear Collider (CLIC) is an attractive option for a future multi-TeV linear electron-positron collider, offering the potential for a rich precision physics programme, combined with sensitivity to a wide range of new phenomena. The physics reach of CLIC has been studied in the context of three distinct centre-of-mass energy stages, 350 GeV, 1.4 TeV and 3.0 TeV. This staged scenario provides the ideal environment for precise studies of the properties of the ~125 GeV Higgs boson. Operation at 350 GeV allows the couplings and width of the Higgs boson to be determined in a model-independent manner through the study of the Higgs-strahulung and WW-fusion processes. Operation at higher centre-of-mass energies provides high statistics for even more precise measurements and the potential to study the top Yukawa coupling and even the Higgs boson self-coupling. In this talk we explore the potential of the CLIC Higgs physics programme, based on full simulation studies of a wide range of final states. The evolution of the physics sensitivity with centre-of-mass energy is presented in terms of model-independent coupling fits and the constrained kappa fits employed at the LHC.
        Speaker: Dr. Eva Sicking (CERN)
        Slides
      • 15:55
        Measurement of Higgs Boson Couplings at the International Linear Collider 20m
        One of the key topics in the physics program of the ILC is the precision measurement of the couplings of the Higgs boson. At linear colliders, Higgs bosons are produced singly in association with Z bosons and by W boson fusion. In both processes, the backgrounds to Higgs production are relatively small, and all major Higgs boson decay modes can be observed. The Zh process gives tagged Higgs bosons, allowing measurement of absolute branching ratios and the observation of invisible and other exotic decays. The W fusion process gives high rates for precision measurement and allows the model-independent determination of the Higgs boson width and the individual Higgs couplings. This contribution will report the current status of this program, with results from full-simulation studies of Higgs processes in the detectors proposed for the ILC.
        Speaker: Dr. Junping Tian (KEK)
        Slides
      • 16:15
        Higgs Physics at the FCC-ee 15m
        Now that the masses of the Higgs and Top quark are known, circular electron positron colliders, able to measure the properties of these particles with high accuracy, are receiving considerable attention. As part of the Future Circular Collider study at CERN, the Future e+e- Circular Collider, FCC-ee, (formerly called TLEP) is a new generation collider, fitting in a 80 to 100km tunnel, and able to deliver high luminosity in up to four interaction points from at least the Z peak to above the top pair threshold. At the ZH production optimum, around 240 GeV, the luminosity of 6 1034 /cm2/s in four IPs yields more than 2 Million Higgs decays in 5 years through the e+e-  ZH process. This sample opens the possibility of sub-per-cent precision measurement of the Higgs boson couplings to light fermions and to gauge-bosons, and of the Higgs boson width. These precision measurements are sensitive to multi-TeV new physics interacting with the scalar sector. The ZH production mechanism also gives access to the invisible or exotic branching ratios down to the per mil level, and with a more limited precision to the triple Higgs coupling. The luminosity expected at the top pair production threshold (√s ~ 340-350 GeV) further improves some of these figures by a factor of two, and is sensitive to the Higgs boson coupling to the top quark.
        Speaker: Mr. Manqi RUAN (IHEP and CERN)
        Slides
      • 16:30
        Measuring the Trilinear Higgs Coupling at the LHC 15m
        The results from the LHC indicate that the couplings of the Higgs boson to other particles are consistent with the Standard Model. However the final and ultimate test as to whether this particle is the standard Higgs boson will be the coupling of the Higgs boson to itself. We study the Higgs pair production from gluon fusion at the LHC and try to determine how accurately the trilinear Higgs coupling can be determined theoretically. Let us introduce a general trilinear Higgs coupling as kappa x lambda_HHH(SM). For the Standard Model, kappa = 1. We found that at the LHC with a center of mass of energy [sqrt(S)]of 14 TeV, the measurement of cross section of 40 fb with negligible experimental error would only restrict kappa to be between 0.86 and 1.12. For sqrt(S) = 100 TeV, the value of kappa will be limited to be between 0.89 and 1.10 that is slightly better than the lower energy.
        Speaker: Prof. Chung Kao (University of Oklahoma)
        Slides
      • 16:45
        Determination of the Higgs CP mixing angle in the tau decay channels 15m
        We investigate the measurement of the CP mixing angle of the 126 GeV neutral spin-0 Higgs boson in its tau decay channels. The tau decay channel of the Higgs boson has the particular advantage that possible CP-violating contributions alter the Higgs-tau-tau coupling already at the leading order. Within our proposed method the di-lepton, lepton-hadron as well as the hadron-hadron channel of the tau decay can be included in the measurement. We discuss the prospect of the precision on the CP mixing angle measured at the LHC and compare with the expected sensitivity at the LC. We furthermore derive the distributions of the major background - the contribution due to virtual Z and photon exchange.
        Speaker: Dr. Stefan Berge (RWTH Aachen)
        Slides
      • 17:00
        Anomalous Higgs couplings in angular asymmetries of H--->Zll and e+e- ---> HZ 15m
        In this work we study in detail the phenomenological impact of anomalous Higgs couplings in angular asymmetries of the crossing symmetric processes H--->Zll and e+e- --> HZ. Beyond Standard Model (BSM) physics is parametrized in terms of the SU(3)xSU(2)xU(1) dimension six effective Lagrangian. In the light of present bounds on d=6 interactions we study how angular asymmetries can reveal non-standard CP even and CP odd couplings. We provide simplified approximate expressions to all observables of interest making transparent their dependence on anomalous couplings. We show that some of the asymmetries may reveal BSM effects that would be hidden in other observables. In particular, CP even and CP odd d=6 HZgamma couplings as well as HZl+l- contact interactions can generate asymmetries at the percent level, while having small or no effect on the di-lepton invariant mass spectrum of H--->Zll. Finally, the higher di-lepton invariant masses probed in e+e- ---> HZ lead to interesting differences in the asymmetries with respect to those of H--->Zll.
        Speaker: Dr. Diogo Boito (Technische Universitaet Muenchen --- TUM)
        Slides
      • 17:15
        Polarized top and Charged Higgs boson 15m
        The charged Higgs boson is quite common in many new physics models. In this study we examine the potential of observing a heavy charged Higgs boson in its decay mode of top-quark and bottom-quark in the Type-II Two-Higgs-Doublet-Model. In this model, the chirality structure of the coupling of charged Higgs boson to the top- and bottom-quark is very sensitive to the value of \tan\beta. As the polarization of the top-quark can be measured experimentally from the top-quark decay products, one could make use of the top-quark polarization to determine the value of \tan\beta. We preform a detailed analysis of measuring top-quark polarization in the production channels gb\to tH^- and g\bar{b}\to \bar{t}H^+. We calculate the helicity amplitudes of the charged Higgs boson production and decay.Our calculation shows that the top-quark from the charged Higgs boson decay provides a good probe for measuring \tan\beta, especially for the intermediate \tan\beta region. On the contrary, the top-quark produced in association with the charged Higgs boson cannot be used to measure \tan\beta because its polarization is highly contaminated by the t-channel kinematics.
        Speaker: Prof. Shou-hua Zhu (ITP, Peking University)
        Slides
    • 15:00 → 17:30
      Beyond the Standard Model Auditorium 2 ()

      Auditorium 2

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Prof. Tobias Golling (Yale)
      • 15:00
        Searches for exotica at Belle 20m
        Searches for exotic phenomena at Belle are presented.
        Speaker: Jan Hasenbusch (Bonn University)
        Slides
      • 15:20
        Searches for exotica at Babar 20m
        Searches for exotic phenomena at Babar are presented.
        Speaker: Dr. Markus Ebert (SLAC, USA)
        Slides
      • 15:40
        Searches for exotica at LHCb 15m
        Searches for exotic phenomena at LHCb are presented.
        Speaker: Ricardo Vazquez Gomez (Universitat de Barcelona)
        Slides
      • 15:55
        Searching for hidden sectors in multiparticle production at the LHC 15m
        Most signatures of new physics in colliders have been studied on the transverse plane with respect to the beam direction. In this work we consider the impact of a hidden sector (e.g. hidden valley models) beyond the SM on inclusive longitudinal (pseudo)rapidity correlations and factorial moments of multiplicity distributions in pp inelastic collisions, with special emphasis in the forthcoming LHC results.
        Speaker: Prof. Miguel-Angel Sanchis-Lozano (IFIC - University of Valencia)
        Slides
      • 16:10
        Testing SUSY models for the muon g-2 anomaly at LHC 15m
        Non-universal gaugino mass models can naturally account for the dark matter relic density via the bulk annihilation process with relatively light Bino LSP and right sleptons in the mass range of ~ 100 GeV, while accommodating the observed Higgs boson mass of ~ 125 GeV with TeV scale squark/gluino masses. A class of these models can also account for the observed muon g-2 anomaly via SUSY loops with wino and left sleptons in the mass range of 400 - 600 GeV. These models can be tested at LHC via electroweak production of charged and neutral wino pair, leading to robust trilepton and same sign dilepton signals. We investigate these signals along with the standard model background for both 8 and 13 TeV LHC runs.
        Speaker: Dr. Siba Prasad Das (IOP, Bhubaneswar, India)
      • 16:25
        The Fermilab Muon g-2 Experiment 15m
        The anomalous magnetic dipole moment of the muon can be both measured and computed to very high precision, making it a powerful probe to test the standard model and search for new physics such as SUSY. The previous measurement by the Brookhaven E821 experiment found a 3.6 standard deviation discrepancy from the predicted value. The new g-2 experiment at Fermilab will improve the precision by a factor of four through a factor of twenty increase in statistics and a reduced systematic uncertainty with an upgraded apparatus. The experiment will also carry out an improved measurement of the muon electric dipole moment. Construction at Fermilab is well underway.
        Speaker: Dr. Graziano Venanzoni (LNF-INFN Frascati)
        Slides
      • 16:40
        Perturbative analysis of the electron electric dipole moment and CP violation in two-Higgs-doublet models 15m
        I consider a general two-Higgs-doublet model with CP violation. I give a perturbative expansion for the mass eigenstates in terms of the small CP-violating phase. I use these analytical expressions to show that O(0.01) CP violation is allowed by the experimental bounds on the electron electric dipole moment in some regions of the parameter space. These regions also include parameters that are expected to give a strongly first-order electroweak phase transition required for electroweak baryogenesis. I also comment on how to incorporate the CP violation into the searches for a strongly first-order electroweak phase transition which could explain the matter/antimatter asymmetry in the Universe.
        Speaker: Ms. Seyda Ipek (University of Washington)
        Slides
      • 16:55
        Searches for Dark Forces with KLOE 15m
        In some models of physics beyond the Standard Model it is predicted the existence of light neutral vector particles (U bosons) mediator of new gauge interactions under which ordinary matter is uncharged. Motivated by astrophysical considerations, their mass, M_U, is expected to be of order 1 GeV or ligther. These new particles can be observed as sharp resonances at M_U in the invariant mass distribution of charged lepton or pion pairs in reactions of the type e+e- --> l(pi)+l(pi)- gamma, or in meson Dalitz decays. KLOE has formerly searched for U boson production using phi daitz decay events, setting limits in the mass region 50 < M_U < 520 MeV. We have now completed our analysis of e+e- --> mu+mu- gamma, which has allowed us setting the best limits to date in the region between 500 and 1000 MeV. Preliminary results for the electron-positron final state are also available.
        Speaker: Dr. Anthony Palladino (Laboratori Nazionali di Frascati dell'INFN)
        Slides
      • 17:10
        Search for Nucleon Decay in Super-Kamiokande 15m
        Nucleon decay search is one of key for opening a door to Grand Unified Theories (GUTs). A favored proton decay mode by GUTs based on SU(5) symmetry is p-->e^+pi^0. On the other hand, SUSY moderated GUTs prefer p-->nuK^+. The Super-Kamiokande, a large water cherenkov detector, has been running more than 10 years and it is suitable for the nucleon decay search. In this talk, the latest results of nucleon decay searches in Super-Kamiokande will be presented.
        Speaker: Dr. Makoto Miura (Kamioka observatory, ICRR)
        Slides
    • 15:00 → 17:35
      Detector RD and Performance Auditorium 3B ()

      Auditorium 3B

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Marcel Demarteau (Argonne National Laboratory)
      • 15:00
        The LHCb VELO Upgrade 20m
        The upgrade of the LHCb experiment, planned for 2018, will transform the experiment to a trigger-less system reading out the full detector at 40 MHz event rate. All data reduction algorithms will be executed in a high-level software farm with access to the complete event information. This will enable the detector to run at luminosities of 2 x 10^33 /cm^2/s and probe physics beyond the Standard Model in the heavy flavour sector with unprecedented precision. The Vertex Locator (VELO) is surrounding the interaction region is used to reconstruct primary and secondary vertices and measure the flight distance of long-lived particles. The upgraded VELO must be capable of fast pattern recognition and track reconstruction while maintaining the exceptional resolution of the current detector. This is realised through a hybrid pixel detector using silicon sensors with 55x55 um^2 pitch, read out by the VeloPix ASIC which is being developed based on the TimePix/MediPix family. The hottest region will have pixel hit rates of 900 Mhits/s yielding a total data rate more than 3 Tbit/s for the upgraded VELO. The detector modules are located in a separate vacuum, separated from the beam vacuum by a thin custom made foil. The foil will be manufactured through milling and possibly thinned further by chemical etching. The detector halves are retracted when the beams are injected and closed at stable beams, positioning the first sensitive pixel at 5.1 mm from the beams. The high data rates require development of low-mass, high-speed, flexible electrical serial links bringing the data out of the vacuum where electrical-to-optical conversion is performed. The material budget will be minimised by the use of evaporative CO_2 coolant circulating in microchannels within 400 um thick silicon substrates. Microchannel cooling brings many advantages: very efficient heat transfer with almost no temperature gradients across the module, no CTE mismatch with silicon components, and low material contribution. This is a breakthrough technology being developed for LHCb. The 40 MHz readout will also bring significant conceptual changes to the way in which the upgrade trigger is operated. Work is in progress to incorporate momentum and impact parameter information into the trigger at the earliest possible stage, using the fast pattern recognition capabilities of the upgraded detector. The current status of the VELO upgrade will be described together with a presentation of recent test results.
        Speaker: Dr. Lars Eklund (University of Glasgow)
        Slides
      • 15:20
        The STAR Heavy Flavor Tracker (HFT) 20m
        The heavy quark hadrons are suggested as a clean probe for studying the early dynamic evolution of the dense and hot medium created in high-energy nuclear collisions. The Heavy Flavor Tracker (HFT) of the STAR experiment, designed to improve the vertex resolution and extend the measurement capabilities in the heavy flavor domain, was installed for the 2014 heavy ion run of RHIC. It is composed of three different silicon detectors arranged in four concentric cylinders close to the STAR interaction point. The two innermost layers are based on CMOS monolithic active pixels (MAPS), featured for the first time in a collider experiment, and the two outer layers are based on pads and strips. The two innermost HFT layers are placed at a radius of 2.7 and 8 cm from the beam line and accommodate 400 ultra-thin (50 um) high resolution MAPS sensors arranged in 10-sensor ladders to cover a total silicon area of 0.16 m2. Each sensor includes a pixel array of 928 rows and 960 columns with a 20.7 μm pixel pitch, providing a sensitive area of ~ 3.8 cm2. The sensor features 185.6 μs readout time and 170 mW/cm2 power dissipation. The detector is air-cooled, allowing a global material budget of 0.50% radiation length per layer. A novel mechanical approach to detector insertion enables effective installation and integration of the pixel layers within an 8 hour shift during the on-going STAR Run. After a detailed description of the design specifications and the technology implementation, the detector status and operations during the current 200 GeV Au+Au run will be presented in this talk, with a particular focus on calibration and general system operations aimed at stabilizing the running conditions. A preliminary estimation of the detector performance meeting the design requirements will be reported.
        Speaker: Mr. Giacomo Contin (Lawrence Berkeley National Laboratory - LBNL)
        Slides
      • 15:40
        Diamond particle detectors systems in high energy physics 15m
        With the first three years of the LHC running complete, ATLAS and CMS are planning to upgrade their innermost tracking layers with more radiation hard technologies. Chemical Vapor Deposition (CVD) diamond is one such technology. CVD diamond has been used extensively in beam condition monitors as the innermost detectors in the highest radiation areas of BaBar, Belle, CDF and all LHC experiments. This talk will describe the lessons learned in constructing the ATLAS Beam Conditions Monitor (BCM), Diamond Beam Monitor (DBM) and the CMS Pixel Luminosity Telescope (PLT) all of which are based on CVD diamond with the goal of elucidating the issues that should be addressed for future diamond based detector systems. The talk will also present the first beam test results of prototype diamond devices with 3D detector geometry that should further enhance the radiation tolerance of this material.
        Speaker: William Trischuk (University of Toronto)
        Slides
      • 15:55
        DEPFET pixel detectors for future electron-positron experiments 20m
        The DEPFET Collaboration develops highly granular, ultra-thin pixel detectors for outstanding vertex reconstruction at future collider experiments. A DEPFET sensor, by the integration of a field effect transistor on a fully depleted silicon bulk, provides simultaneously position sensitive detector capabilities and in-pixel amplification. The characterization of the latest DEPFET prototypes has proven that a comfortable signal to noise ratio and excellent single point resolution can be achieved for a sensor thickness of 50 micrometers. The close to final auxiliary ASICs have been produced and found to operate a DEPFET pixel detector of the latest generation with the required read-out speed. A complete detector concept is being developed for the Belle II experiment at the new Japanese super flavor factory. DEPFET is not only the technology of choice for the Belle ̃II vertex detector, but also a solid candidate for the ILC. Therefore, in this paper, the status of DEPFET R&D project is reviewed in the light of the requirements of the vertex detector at a future electron-positron collider.
        Speaker: Mr. Marçà Boronat Arevalo (PHD student)
        Slides
      • 16:15
        Status and plan for the upgrade of CMS Pixel Detector 20m
        The silicon pixel detector is the innermost component of the CMS tracking system and plays a crucial role in the all-silicon CMS tracker. While the current pixel tracker is designed for and performing well at an instantaneous luminosity of up to 1*10^{34}cm^{-2} s^{-1}, it can no longer be operated efficiently at significantly higher values. Based on the strong performance of the LHC accelerator, it is anticipated that peak luminosities of two times the design luminosity are likely to be reached before 2018 and perhaps significantly exceeded in the running period until 2022, referred to as Phase I. Therefore an upgrade is planed for the year-end technical stop in 2016: With a new pixel readout chip (ROC), an additional fourth layer, two additional endcap disks, and a significantly reduced material budget the upgraded pixel detector will be able to sustain the efficiency of the pixel tracker at the increased requirements imposed by high luminosities and pile-up. The main new features of the upgraded pixel detector would be ultra-light mechanical design, digital readout chip with higher rate capability and new cooling system. These and other design improvements, along with results of Monte Carlo simulation studies for the expected performance of the new pixel detector will be discussed and compared to that of the current CMS detector.
        Speaker: Rong-Shyang Lu (National Taiwan University)
        Slides
      • 16:35
        Phase 2 Upgrade of the CMS Tracker 20m
        The LHC machine is planning an upgrade program which will smoothly bring the luminosity up to or above 5×10^34 cm−2s−1 sometimes after 2020, to possibly reach an integrated luminosity of 3000 fb−1 at the end of that decade. In this ultimate scenario, called Phase2, when LHC will reach the High Luminosity (HL-LHC) phase, CMS will need a completely new Tracker detector, in order to fully exploit the high-demanding operating conditions and the delivered luminosity. The new Tracker should have also trigger capabilities. To achieve such goals, R&D activities are ongoing to explore options and develop solutions that would allow including tracking information at Level-1. The design choices for the CMS pixel and outer tracker upgrades are discussed along with some highlights of the R&D activities.
        Speaker: Dr. Stefano Mersi (CERN)
        Slides
      • 16:55
        ATLAS Inner Tracking detectors: Run 1 performance and developments for Run 2 20m
        The measurement of charge particle trajectories with the inner tracking detectors at the ATLAS experiment is a key input for higher-level object reconstructions, ranging from leptons to the identification of heavy-flavor jets. In addition the information provided by the inner tracking systems has been proven to be very powerful for disentangling the effects of several interactions occurring in the same bunch crossing (pile-up). In this contribution, we will review the performance during the Run 1 data-taking and preparation for the next run in 2015. In particular, we will show how the knowledge of the passive material inside the inner tracking acceptance has been further studied to reduce the systematic errors on the tracking efficiency, with benefits for physics measurements. In addition, the developments in disentangling close-by tracks which naturally occur in the decay of very high-pT objects (e.g. taus, of close to the core of jets) will be presented. The ongoing upgrade of the ATLAS detector includes an extra silicon layer (IBL) in the inner tracking system; the preparation for the integration of the new hardware and its expected performance will be reviewed as well. Finally, it will be presented a brief report on recent developments of the tracking software aiming for speed and disk-space optimizations.
        Speaker: Wolfgang Lukas
        Slides
      • 17:15
        The Pixel Detector of the ATLAS experiment for the Run2 at the Large Hadron Collider 20m
        The Pixel Detector of the ATLAS experiment has shown excellent performance during the whole Run-1 of LHC. Taking advantage of the long showdown, the detector was extracted from the experiment and brought to surface, to equip it with new service quarter panels, to repair modules and to ease installation of the Insertable B-Layer (IBL). IBL is a fourth layer of pixel detectors, and will be installed in May 2014 between the existing Pixel Detector and a new smaller radius beam-pipe at a radius of 3.3 cm. To cope with the high radiation and pixel occupancy due to the proximity to the interaction point, a new read-out chip and two different silicon sensor technologies (planar and 3D) have been developed. Furthermore, the physics performance will be improved through the reduction of pixel size while, targeting for a low material budget, a new mechanical support using lightweight staves and a CO2 based cooling system have been adopted. IBL construction is now completed. An overview of the IBL project as well as the experience in its construction will be presented, focusing on adopted technologies, module and staves production, qualification of assembly procedure, integration of staves around the beam pipe and commissioning of the detector.
        Speaker: Dr. Beatrice Mandelli (Oslo University (Norway))
        Slides
    • 15:00 → 17:30
      Flavour Physics Sala 3+4 ()

      Sala 3+4

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Dr. Patrick Koppenburg (Nikhef)
      • 15:00
        Measurement of the branching fraction of $B \to X_s \gamma$ and $A_{CP}$ in $B \to X_{s+d} \gamma$ from Belle 15m
        The radiative B decays proceed through a loop diagram and are sensitive to New Physics. We perform measurements of the branching fraction of $B \to X_s \gamma$, where $X_s$ is the hadronic state with strangeness. Using a semi-inclusive method in which $X_s$ is reconstructed with 38 exclusive modes, the inclusive branching fraction in $M_{X_s} < 2.8$ GeV is measured. We also report the measurement using the recoil tag method. The Standard Model predicts null CP asymmetry ($A_{CP}$) of $B \to X_{s+d} \gamma$, where $X_{s+d}$ is the hadronic state with strange or down quark. We present a measurement of $A_{CP}$ with lepton tag. The analyses are based on the full data set of Belle containing 772 million $B \bar{B}$ pairs.
        Speaker: Mr. Luis Pesantez (University of Bonn)
        Slides
      • 15:15
        Study of B -> K pi pi gamma decays 15m
        In b -> s gamma transitions, the standard model predicts that B0 (antiB0) decays are related predominantly to the presence of right (left) handed photons in the final state. Therefore, the mixing-induced CP asymmetry in B -> fCP decays, where fCP is a CP eigenstate, is expected to be small. This prediction may be altered by new-physics (NP) processes in which opposite helicity photons are involved. Independently, decays to K pi pi gamma can display an interesting hadronic structure: they have contributions from several kaonic resonances decaying to Kpipi. The decays of these resonances themselves exhibits a resonant structure, with contributions from K*pi, Krho and a (Kpi) S-wave. In the present analysis, we extract information about the Kpipi resonant structure by means of an amplitude analysis of the Kpipi and Kpi invariant mass distributions in B+ -> K+pi-pi+ gamma decays. The results are used, assuming isospin symmetry, to extract the mixing-induced CP parameters of the process B0 -> K0S rho0 gamma from the time-independent analysis of B0 -> K0S pi+ pi- gamma.
        Speaker: Dr. Eugeni Grauges (U. de Barcelona (UB))
        Slides
      • 15:30
        Dilepton invariant mass spectrum and the decay rate in $B^\pm \to \pi^\pm \mu^+\mu^-$ 15m
        We present a precise calculation of the dilepton invariant-mass spectrum and the decay rate for B±→π±ℓ+ℓ− (ℓ±=e±,μ±) in the Standard Model (SM) based on the effective Hamiltonian approach for the b→dℓ+ℓ− transitions. With the Wilson coefficients already known in the next-to-next-to-leading logarithmic (NNLL) accuracy, the remaining theoretical uncertainty in the short-distance contribution resides in the form factors f+(q2), f0(q2) and fT(q2). Of these, f+(q2) is well measured in the charged-current semileptonic decays B→πℓνℓ and we use the B-factory data to parametrize it. The corresponding form factors for the B→K transitions have been calculated in the Lattice-QCD approach for large-q2 and extrapolated to the entire q2-region using the so-called z-expansion. Using an SU(3)F-breaking Ansatz, we calculate the B→π tensor form factor, which is consistent with the recently reported lattice B→π analysis obtained at large q2. The prediction for the total branching fraction B(B±→π±μ+μ−)=(1.88+0.32−0.21)×10−8 is in good agreement with the experimental value obtained by the LHCb collaboration. In the low q2-region, the Heavy-Quark Symmetry (HQS) relates the three form factors with each other. Accounting for the leading-order symmetry-breaking effects, and using data from the charged-current process B→πℓνℓ to determine f+(q2), we calculate the dilepton invariant-mass distribution in the low q2-region in the B±→π±ℓ+ℓ− decay. This provides a model-independent and precise calculation of the partial branching ratio for this decay.
        Speaker: Prof. Ahmed Ali (DESY)
        Slides
      • 15:45
        Branching fraction and CP asymmetry measurements in inclusive B -> Xs gamma and B -> Xs l+l- decays 15m
        We use the large dataset collected with the BABAR detector to measure the branching fractions and CP asymmetries of the inclusive decays B -> Xs l+ l- and B -> Xs gamma. We adopt a sum-of-exclusive-states method, whereby 20 different final states are selected. The branching fraction and CP asymmetry for B -> Xs l+ l- are measured in intervals of q2 (di-lepton invariant mass) and also in bins of m(Xs), the hadronic mass. Simulation is used to extrapolate to the fully inclusive rate. We also report the CP asymmetry for B -> Xs gamma, and the first measurement of the difference between ACP for charged and neutral decay modes, DeltaA(Xs gamma). Using the value obtained, we provide 68% and 90% confidence intervals on the imaginary part of the ratio of the Wilson coefficients corresponding to the chromo-magnetic dipole and the electromagnetic dipole transitions.
        Speaker: Prof. Gerald Eigen (University fo Bergen)
        Paper
        Slides
      • 16:00
        Study of B->K(*)mu+mu- decays at CMS experiment 15m
        Measurements of rare B meson decay properties provide an alternative approach to direct searches for physics beyond the Standard Model. These decays, which proceed through flavor-changing neutral currents, can have interferences from new physics through loop diagrams. In particular, the angular distribution of the decay B to K(*) mu+mu- can be measured as a function of the square of the dimuon invariant mass, an excellent probe to possible new physics scenarios. This talk presents the forward-backward asymmetries of the muons, the K* longitudinal polarization fractions and the differential branching fractions, measured with data recorded by the CMS experiment.
        Speaker: Dr. Kajari Mazumdar (TIFR - EHEP, India)
        Slides
      • 16:15
        Study of rare and suppressed processes in B meson decays with the ATLAS experiment 15m
        The large amount of Heavy Flavor data collected by the ATLAS experiment is potentially sensitive to New Physics, which could be evident in processes that are naturally suppressed in the Standard Model. The most recent results on the search for the rare decay Bs (B0) -> mu+mu- are presented, as well as results of the angular analysis of the semileptonic rare decay Bd → K*0 mu+mu- -> K+pi-mu+mu-, extracting the distribution parameter AFB and FL (the accuracy obtained from data collected in 2011 is comparable to the best previous measurement in the region q^2(mu+mu-) -> 16 GeV^2).
        Speaker: Dr. Paolo Iengo (CERN)
        Slides
      • 16:30
        The impact of power corrections on B-->K^* mu mu observables 15m
        The exclusive decay B-->K^* mu mu has gained a lot of attention because the recent LHCb angular analysis has indicated significant deviations from the Standard Model which could be interpreted as a possible first signal of new physics. The sensitivity of theory predictions to hadronic input parameters can be minimized be choosing an optimized set of observables. On the other hand, non-perturbative Lambda_QCD/mb power corrections introduce a source of uncertainty for theory predictions as they cannot be calculated from first principles. In my talk I will present a systematic approach to estimate factorizable power corrections and discuss their impact on angular observables.
        Speaker: Dr. Lars Hofer (IFAE Barcelona)
        Slides
      • 16:45
        B_s^0 lifetime measurements from the D0 experiment 15m
        We present new lifetime measurements of B mesons, using 10.4 fb-1 of proton-antiproton collisions collected by the D0 detector during Run II at the Fermilab Tevatron Collider. We report an update of the B_s^0 lifetime in semi-inclusive flavor-specific decays B_s^0 -> mu nu D_s X (and charge conjugate). We account for the missing energy from the neutrino and other possible undetected decay products using simulation. The same analysis also determines the B^0 lifetime in the corresponding decay mode B^0 -> mu nu D- X and from these two measurements, we report the most precise extraction of the lifetime ratio tau(B_s^0)/tau(B^0), which agrees with lattice QCD predictions. In addition, we analyse the fully-reconstructed CP-odd decay B_s^0 -> J/psi f_0(980), and extract the lifetime of this B_s^0 state, which is associated with the heavy mass eigenstate in the absence of CP violation. We perform a multi-dimensional unbinned fit of the mass, lifetime, and lifetime uncertainty, and account for contamination from several peaking backgrounds close to the signal mass range.
        Speaker: Prof. et al. D0 Collaboration (Fermi National Accelerator Laboratory)
        Slides
      • 17:00
        Electroweak penguins at LHCb 15m
        Electroweak penguin b-hadron and c-hadron decays are very sensitive to physics beyond the Standard Model. Recent LHCb measurements have shown indications of large unexpected asymmetries in B→K*μμ and the first observation of the photon polarisation in b→sγ decays. We report the most recent LHCb results in this sector.
        Speaker: Dr. Jibo HE (CERN)
        Slides
      • 17:15
        Observation of B_s to mu+mu- decay and search for B_d to mu+mu- at CMS 15m
        Rare beauty meson decays B_s,d to mu+mu- are searched in pp collisions at LHC using a data sample collected by the CMS experiment. These decays are highly suppressed in the standard model. They can only proceed through the flavor-changing neutral currents, which are forbidden at tree-level diagrams. These decays are an excellent probe of new physics: any difference between the measured branching fraction and the standard model prediction could provide a smoking gun signal of new physics. In this talk the observation of B_s to mu+mu- decay as well as the search for B_d to mu+mu- will be presented.
        Speaker: Dr. Nuno Leonardo (Purdue University / LIP)
        Slides
    • 15:00 → 17:30
      Formal Theory Developments Sala 8+9 ()

      Sala 8+9

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Prof. Koji Hashimoto (Osaka university / RIKEN)
      • 15:00
        A unified approach to nuclei: The BPS Skyrme Model 30m
        In this talk, we will present a concrete model of a low energy effective field theory of QCD, the well-known Skyrme Model. Specifically, we will work with the BPS submodel [1] in order to describe the binding energies of nuclei. This BPS Skyrme model is charaterized by having a saturated bound for the energy proportional to the baryon number of the nuclei. After presenting this classical result, we will proceed with a semi-classical quantization of the coordinates of spin and isospin. Then, with the further inclusion of the Coulomb interaction as well as a small explicit breaking of the isospin symmetry, we finally calculate the binding energies of nuclei, where an excellent agreement has been found for the nuclei with high baryon number [2], [3]. References [1] C. Adam, J. Sanchez-Guillen, A. Wereszczynski, Acta Phys. Pol. B 41, (2010) 2717 . [2] C. Adam, C. Naya, J. Sanchez-Guillen, A. Wereszczynski, Phys. Rev. Lett. 111 (2013) 232501. [3] C. Adam, C. Naya, J. Sanchez-Guillen, A. Wereszczynski, Phys. Rev. C 88 (2013) 054313.
        Speaker: Mr. Carlos Naya (Universidade de Santiago de Compostela and Instituto Galego de Física de Altas Enerxías (IGFAE))
        Slides
      • 15:30
        Lifshitz hyperscaling violating holography 30m
        Holographic techniques have been instrumental in understanding certain aspects of strongly correlated systems, both in high energy and condensed matter physics. One of the most interesting applications of holography in the condensed matter setting is the study of quantum critical points exhibiting Lifshitz or hyperscaling violating Lifshitz symmetry. Although various aspects of the holographic dictionary for Lifshitz quantum critical points have been studied in special cases, the general structure for arbitrary critical exponent z has not been fully understood, while very little is known for the hyperscaling violating case. We develop a general method for systematically constructing the holographic dictionary for both Lifshitz and hyperscaling violating Lifshitz critical points with arbitrary Lorentz violating and hyperscaling violating parameters, for a large class of bulk actions admitting such backgrounds. This allows us to determine quite generically various physical properties of the dual quantum critical points, such as the spectrum of operators, the Ward identities, and the Lifshitz confromal anomaly.
        Speaker: Dr. Ioannis Papadimitriou (Instituto de Fisica Teorica UAM/CSIC)
        Slides
      • 16:00
        Spontaneous Breaking of Scale Invariance in U(N) Chern-Simons Gauge Theories in Three Dimensions 30m
        I demonstrate the existence of a massive phase in a conformally invariant U(N) Chern-Simons gauge theory in D=3 with matter fields in the fundamental representation. These models have attracted recent attention as being dual, in the conformal phase, to theories of higher spin gravity on AdS_4. Using the ‘t Hooft large N expansion, exact solutions are obtained for scalar current correlators in the massive phase where the conformal symmetry is spontaneously broken. A massless dilaton appears as a composite state, and its properties are discussed. Solutions exist for matter fields that are either bosons or fermions.
        Speaker: Prof. William Bardeen (Fermilab)
        Slides
      • 16:30
        A scenario for critical scalar field collapse in AdS_3 30m
        We present a family of exact solutions, depending on two parameters alpha and b (related to the scalar field strength), to the three-dimensional Einstein-scalar field equations with negative cosmological constant. For b = 0 these solutions reduce to the static BTZ family of vacuum solutions, with mass M =-alpha. For nonvanishing b, the solutions become dynamical and develop a strong spacelike central singularity. The alpha < 0 solutions are black-hole like, with a global structure topologically similar to that of the BTZ black holes, and a finite effective mass. We show that the near-singularity behavior of the solutions with alpha > 0 agrees qualitatively with that observed in numerical simulations of subcritical collapse. We analyze the linear perturbations of the threshold solution, alpha = 0, in the Lambda = 0 approximation, and find that it has only one unstable growing mode, which qualifies it as a candidate critical solution for scalar field collapse.
        Speaker: Dr. Alessandro Fabbri (Centro Fermi / Univ. Bologna / IFIC (CSIC))
        Slides
    • 15:00 → 17:30
      Heavy Ions Sala 2 ()

      Sala 2

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Convener: Dr. David d'Enterria (CERN)
      • 15:00
        Ultra-peripheral heavy-ion collisions with ALICE and CMS 20m
        Protons and ions accelerated by the LHC carry an electromagnetic field, which acts as a source of photons. The beam energy at the LHC makes it the most energetic photon source ever built. The interaction of such high-energy photons with nuclei (or protons) can be studied in ultra-peripheral heavy-ion collisions, where the impact parameter is larger than the sum of the nuclear radii and hadronic interactions are therefore strongly suppressed. Both the ALICE and CMS collaborations have studied photonuclear production of vector mesons in ultra-peripheral Pb-Pb and p-Pb collisions. The process effectively corresponds to an interaction between a photon, generated from the electromagnetic field of one of the nuclei with the other (target) nucleus. The ALICE Collaboration has already published results on exclusive photoproduction of J/$\psi$ mesons at mid and forward rapidities in Pb-Pb collisions. The cross section for this process is particularly sensitive to the nuclear gluon distribution. In this talk, the latest results from ALICE and CMS on exclusive production of light and heavy vector mesons in ultra-peripheral Pb-Pb collisions will be presented, as well as the measurement of exclusive heavy vector meson photoproduction off protons in ultra-peripheral p-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV. Exclusive photoproduction of quarkonia is a powerful tool to search for parton saturation effects. Although gluon saturation is expected to occur at some scale to limit the growth of the Parton Distribution Function (PDF) at low Bjorken-x values, no compelling evidence for this effect has been found so far. ALICE results provide direct tests of the power law dependence on the J/$\psi$ photoproduction cross section over a wide range of $\gamma {\rm p}$ energies. CMS results on quarkonia photoproduction in p-Pb will also be presented. The prospects for future analyses on ultra-peripheral collisions at the highest LHC energy will also be discussed.
        Speaker: Dr. Daniel Tapia Takaki (The University of Kansas)
        Slides
      • 15:20
        Electroweak probes in Pb-Pb and p-Pb collisions at CMS 20m
        The electroweak bosons are insensitive to final state effects in heavy-ion collisions and thus make excellent probes of the initial state parton distributions in nuclei. This talk presents measurements of photons and weak bosons, via their leptonic decay channels, in pp and PbPb collisions at 2.76 TeV and in pPb collisions at 5.02 TeV.
        Speaker: Dr. Chia-Ming Kuo (National Central University (China))
        Slides
      • 15:40
        Electroweak probes in heavy-ion collisions at the LHC with ATLAS 20m
        Measurements of vector boson production in Pb+Pb collisions provide essential control data for studies of jets and jet quenching in the quark gluon plasma. Because the electroweak bosons do not interact strongly in the plasma measurements their production rates can be predicted using standard high-energy event generators. In addition, the vector boson spectra are potentially sensitive to nuclear parton distribution functions. Results will be presented for measurements of photon, Z, and W+/- production in Pb+Pb and proton-Pb collisions. The measurements will be compared to predicted rates from JETPHOX (for photons) and POWHEG (for Z and W).
        Speaker: Dr. Marisilvia Donadelli (Universidade de Sao Paulo (Brasil))
        Slides
      • 16:00
        Exclusive two-photon production of W-pairs in heavy-ion and proton-proton collisions 20m
        The strong electromagnetic fields surrounding the protons and heavy nuclei accelerated at the CERN Large Hadron Collider may be used to study two-photon and photon-proton/nucleus interactions at unprecedented energies. A process of particular interest is two-photon production of pairs of W bosons. This process is sensitive to the coupling between photons and W bosons, and may therefore be used to probe in particular any anomalous quartic WWgammagamma coupling. The experimental feasibility of studying this process has recently been shown by the CMS experiment. In this presentation, we calculate the expected standard model cross section for this process. The strong absorption is treated in a realistic way to properly exclude interaction where the projectiles interact hadronically. In addition, the polarization of the W and how it affects the angular distribution of its decay products is investigated. These two effects have to our knowledge not been considered in previous calculations. They are found to be essential for the calculation of the production cross section and for the expected yield within an experimentally accessible phase space region.
        Speaker: Prof. Joakim Nystrand (University of Bergen)
        Slides
      • 16:20
        QCD analysis and effective temperature of direct photons in lead-lead collisions at the LHC 20m
        We present a rigorous theoretical analysis of the ALICE measurement of low-p_T direct-photon production in central lead-lead collisions at the LHC with a centre-of-mass energy of \sqrt{s_{NN}}=2.76 TeV. Using NLO QCD, we compute the relative contributions to prompt-photon production from different initial and final states and the theoretical uncertainties coming from independent variations of the renormalisation and factorisation scales, the nuclear parton densities and the fragmentation functions. Based on different fits to the unsubtracted and prompt-photon subtracted ALICE data, we consistently find T = 304 \pm 58 MeV and 309 \pm 64 MeV for the effective temperature of the quark-gluon plasma (or hot medium) at p_T \in [0.8;2.2] GeV and p_T \in [1.5;3.5] GeV as well as a power-law (p_T^{-4}) behavior for p_T > 4 GeV as predicted by QCD hard scattering.
        Speaker: Prof. Michael Klasen (Institute for Theoretical Physics, University of Münster)
        Paper
        Slides
      • 16:40
        LHCb results in proton-nucleus collisions at the LHC 20m
        The production of J/ψ and Υ-mesons decaying into dimuon final state is studied at the LHCb experiment, with rapidity 1.5 < y < 4.0 or -5.0 < y < -2.5 and transverse momentum pT < 15 GeV/c, in proton-lead collisions at a proton-nucleon centre-of-mass energy of 5 TeV. The analysis is based on a data sample corresponding to an integrated luminosity of 1.6/nb. The forward-backward production ratio and the nuclear modification factor are determined for J/ψ and Υ(1S). Indication of forward backward production asymmetry is observed. There is also an indication of J/ψ and Υ(1S) production suppression with respect to proton-proton collisions in forward region and anti-shadowing effect in backward region. Results on vector boson production are also presented.
        Speaker: Dr. Giulia Manca (University of Cagliari)
        Slides
      • 17:00
        Inhomogeneous Phases in QCD 20m
        An important part of the current research efforts in QCD is focused on finding the phases of nuclear matter that occur at finite densities and temperatures. While the zero density, finite temperature region can be addressed with the help of lattice QCD, and the zero temperature, very high-density region can be explored with weak-coupling QCD, for the strong-interaction region of intermediate densities and temperatures one can only rely on effective models and nonperturbative methods. In recent years, compiling arguments and several model calculations indicate that this region may be described by inhomogeneous phases, that is, phases where (some) spatial symmetries are broken. I will present an overview of the most recent results on the topic of inhomogeneous phases of QCD and will discuss their implications for the existence and location of the QCD critical point, the symmetries of the different phases, and the order of the transition lines separating them.
        Speaker: Vivian de la Incera (University of Texas at El Paso)
        Slides
    • 15:00 → 17:30
      IUPAP-C11 Press Room

      Press Room
      Convener: Prof. Hiroaki Aihara (KEK)
    • 15:00 → 15:45
      Top-quark and ElectroWeak Physics: Multi-boson and tau Sala 1 ()

      Sala 1

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Conveners: Prof. Jessie Shelton (University of Illinois, Urbana-Champaign), Shinya Kanemura (University of Toyama)
      • 15:00
        Measurement of multi-boson production and anomalous gauge boson couplings with the ATLAS detector 15m
        ATLAS measurements of multi-boson production processes involving combinations of W, Z and isolated photons are summarized. Measurements using 7 TeV and at 8 TeV p-p collision data are presented. The measurements are performed using leptonic decay modes, including the invisible decay Z--> nunu, as well as semileptonic channels. Differential and total cross sections are presented and are used to place constraints on anomalous triple-gauge boson couplings. An overview of these results is given. The productions of multi-bosons in association with two forward jets at LHC are sensitive to quartic couplings between gauge bosons. We present the latest results of cross section measurements of multi-bosons and limits on anomalous quartic couplings (aQGC) using 8 TeV proton-proton collision data at ATLAS. The aQGC expected sensitivity of tri-bosons and vector boson scattering measurements for future high-luminosity LHC runs is discussed as well.
        Speaker: Prof. Chara Petridou (Aristotle University of Thessaloniki)
        Slides
      • 15:15
        Measurement of the differential W+W- production cross section with jets at in ppbar collisions at CDF 15m
        We present a measurement of the W boson pair production cross section in ppbar collisions at sqrt(s) = 1.96 TeV. The WW candidates are reconstructed from decays containing two charged leptons and two neutrinos, where the charged leptons are either electrons or muons. The measurement is performed using data collected by the CDF II detector from 9.7 fb−1 of integrated luminosity. The total and differential cross section vs. the number of observed jets and the jet transverse momentum are presented.
        Speaker: Mr. Will Parker (University of Wisconsin - Madison)
        Slides
      • 15:30
        Measurements of electroweak properties of $\tau$ lepton at the Belle experiment 15m
        We present preliminary result of the measurement of Michel parameters in leptonic $\tau$ decays and search for the Electric Dipole Moment of the $\tau$ lepton using the world-largest $\tau$ data sample collected by the Belle detector at the KEKB collider. Michel parameters are extracted from $(\tau^{\mp}\to\ell^{\mp}\nu\nu$, $\tau^{\pm}\to\pi^{\pm}\pi^0\nu)$ and $(\tau^{\mp}\to\pi^{\mp}\pi^0\nu$, $\tau^{\pm}\to\pi^{\pm}\pi^0\nu)$ events in Belle's full $\tau$ data sample, where $\tau^{\pm}\to\pi^{\pm}\pi^0\nu$ is used as a spin analyzer since $\tau$ spin information is necessary to evaluate Michel parameters. The Electric Dipole Moment of the $\tau$ lepton is one of the fundamental parameters and useful to discuss the new physics as a signal of it through CP violating loop effect. We have analyzed $\tau^+\tau^-\gamma"$ vertex effect from the $e^+ e^- \to \tau^+ \tau^-$ reaction in Belle's full $\tau$ data sample which is about 30 times larger than that used at the previous measurement.
        Speaker: Dr. Hisaki Hayashii (Nara　Women's University)
        Slides
    • 15:45 → 17:35
      Top-quark and ElectroWeak Physics: Perspectives and future Sala 1

      Sala 1

      Valencia, Spain

      Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)

      Conveners: Prof. Jessie Shelton (University of Illinois, Urbana-Champaign), Shinya Kanemura (University of Toyama)
      • 15:45
        Update of the electroweak precision fit and model-independent constraints on new physics 15m
        We present the updated global fits of the Standard Model and beyond to the electroweak precision data, taking into account the Higgs mass measurements at the LHC and recent progress in theoretical calculations. We use the up-to-date theoretical expressions for the partial widths of the Z boson which include the full two-loop fermionic electroweak contributions. From the global fits, we derive model-independent constraints on new physics by introducing the oblique parameters, the epsilon ones, the modified Zbb couplings, and the dimension-six effective Lagrangian.
        Speaker: Dr. Satoshi Mishima (University of Rome "La Sapienza")
        Slides
      • 16:00
        Measurement of the top quark mass and couplings at Linear Colliders 20m
        Result of merged abstracts: The future precision studies of the Standard Model require excellent knowledge of the top quark mass, to an accuracy of 100 MeV or better. This mass can be measured in a way that is free of any ambiguities from soft QCD by locating the threshold position for e+e- annihilation to top quarks, or, more precisely, the mass of the unstable 1S resonance. The measurement requires a combination of precise QCD calculations, excellent detection efficiency and recognition of top quark events, and excellent control of the initial beam energy and profile. This contribution will report the current status of this program, with results from full-simulation studies of measurements of the top quark threshold in the detectors proposed for ILC and CLIC. Models in which the Higgs boson is composite or strongly interacting typically predict modifications of the coupling of the top quark to vector bosons and, in particular, to the Z boson. The production of the top quarks at e+e- colliders goes through the top quark couplings to the photon and the Z. Thus, precision studies of this pair production process, including its full dependence on electron and top quark polarization, has the potential to extract the form factors for the top quark couplings with high precision and in a model-independent way. This contribution will report the current status of this program, with results from full-simulation studies of top quark pair production in the detectors proposed for ILC and CLIC.
        Speaker: Mr. Nacho Garcia (PhD student)
        Minutes
        Slides
      • 16:20
        Measurement of the Charged Triple Gauge Boson Couplings at the ILC 15m
        After the discovery of the Higgs boson it became even more important to perform precision measurements and to search for deviations from the Standard Model predictions in the electroweak sector. A study of the measurement of trilinear gauge couplings is presented looking at the semi-leptonic W-pair production in e+e- annihilation at the ILC at centre-of-mass energies of 500 GeV and 1 TeV with polarized beams. It is based on a realistic full simulation of this process in the ILD detector at the ILC. We employed a maximum likelihood analysis of a three-dimensional differential cross section based on the W and W decay product angular distributions. A high sensitivity can be reached at the ILC that will allow to probe effects of new physics at the loop level.
        Speaker: Aura Rosca (DESY)
        Slides
      • 16:35
        Precision Electroweak measurements at FCC-ee 15m
        As part of the Future Circular Collider study at CERN, the Future e+e- Circular Collider, FCC-ee, (formerly called TLEP) is a new generation collider, able to fit in a 80 to 100km tunnel, and able to deliver high luminosity in up to four interaction points from at least the Z peak to above the top pair threshold. The luminosity at the Z pole and W pair threshold are over 2.5 and 1.2 1035/cm2/s in each of four Interaction points, respectively allowing to contemplate statistics of over 1012 Z decays and 108 W pairs. Because of the large ring radius, transverse polarization for energy calibration should be available up to and including the W pair threshold, allowing to reach statistical (resp systematic) uncertainties of 10keV (resp 100 keV) on the Z mass and width, and 0.3 MeV (resp 0.5 MeV) on the W mass. At 350 GeV centre-of-mass energy the FCC-ee can deliver a luminosity is 1.8 1034/cm2/s in up to four IPs with a nearly gaussian energy spread of <0.2%, allowing a detailed scan of the top threshold and production of over a million top quark pairs. A precise measurement of the top quark mass with an experimental error of the order of 10 MeV is feasible, as well as an investigation of rare decays and other top quark properties. These and many other precision measurements available in the high statistics and clean environment will be discussed.
        Speaker: Roberto Tenchini (INFN Pisa)
        Slides
      • 16:50
        Two-Loop Effects in Low-Energy Electroweak Measurements 15m
        The talk will outline the recent results on the two-loop electroweak contributions to the electron-electron scattering cross sections and asymmetries. Of course, the two-loop corrections are strongly suppressed relative to the one-loop corrections, but they still contribute a few percent to the cross section, and even this small contribution cannot be ignored at for ultraprecision experiments such as MOLLER planned at JLab. The NNLO calculation techniques we developed for the electron-electron scattering can be adapted for electron-proton processes, electron-positron collisions, and other low-energy experiments involving leptons.
        Speaker: Dr. Aleksandrs Aleksejevs (Grenfell Campus of Memorial Univeristy)
        Slides
      • 17:05
        New Physics Search with Precision Experiments: Theory Input 15m
        The best way to search for new physics is by using a diverse set of probes - not just experiments at the energy and the cosmic frontiers, but also the low-energy measurements relying on high precision and high luminosity. One example of ultra-precision experiments is MOLLER planned at JLab, which will measure the parity-violating electron-electron scattering asymmetry and allow a determination of the weak mixing angle with a factor of five improvement in precision over its predecessor, E-158. At this precision, any inconsistency with the Standard Model should signal new physics. Another promising new physics probe, Belle II experiment at SuperKEKB, will study low-energy electron-positron collisions at high luminosity. The talk will outline the recent developments of the theoretical and computational approaches to higher-order electroweak effects needed for the accurate interpretation of experimental data, and show how new physics particles enter at the one-loop level. For MOLLER and Belle II, we analyze the effects of Z'-boson and dark photon on the total calculated cross section and asymmetry, and show how these hypothetical interactions carries may influence the future experimental results.
        Speaker: Dr. Svetlana Barkanova (Acadia University)
        Slides
      • 17:20
        P-odd and T-odd asymmetries in W-jet production and top-quark decay processes 15m
        It is known that the parity-odd (P-odd) observables without spin measurements are naive-T-odd at the same time, and the naive-T-odd distributions arise from the absorptive part of the scattering amplitudes. We study the P-odd and naive-T-odd asymmetries at the one-loop level in W+jet production and top-quark radiative decay processes, and their observabilities at collider experiments such as the LHC and the ILC, by using the loop-level event generator and realistic simulation tools. We find that the expected accuracies in these experiments are enough to observe these asymmetries. By comparing with the theoretical calculation, our understandings of the perturbative calculation on the absorptive part of the scattering amplitude can be studied.
        Speaker: Dr. Hiroshi Yokoya (University of Toyama)
        Slides
    • 17:30 → 18:00
      Coffee 30m
    • 18:00 → 21:00
      60th CERN anniversary Auditorium 1 ()

      Auditorium 1
      Convener: Prof. Antonio Ferrer (IFIC Valencia)
      • 18:00
        Presentation of the Spanish stamp celebrating CERN 60th anniversary 15m
        Speaker: Carolina Gómez-Zarzuela Irigoyen (Responsable de Relaciones Institucionales e Internacionales. Subdirección de Filatelia. Correos.)
        Slides
      • 18:15
        CERN: a Large International infrastructure with impact beyond science and technology 30m
        Speaker: Prof. Rolf-Dieter Heuer (CERN)
        Slides
      • 18:45
        The construction of the Large Hadron Collider 30m
        Speaker: Dr. Lyn Evans (CERN)
        Slides
      • 19:15
        CERN: the scientific and technological quest 45m
        Speaker: Dr. Sergio Bertolucci (CERN)
        Slides
      • 20:00
        Future CERN projects and their technological challenges 30m
        Speaker: Dr. José Miguel Jiménez (CERN)
        Slides
      • 20:30
        Spain at CERN 30m
        Speaker: Prof. Manuel Aguilar (CIEMAT)
        Slides
  • Sunday, 6 July
    • 09:00 → 16:00
      Closed meeting : Linear Collider Board (LCB): LCB

      Closed meeting. Restricted to LCB Members

      • 09:00
        Linear Collider Overview 30m
        Speaker: Prof. lyndon evans (cern)
      • 09:30
        ILC Status 1h
        Speaker: Michael Harrison (BNL)
      • 10:30
        Break 20m
      • 10:50
        CLIC Status 45m
        Speaker: Prof. Steinar Stapnes (CERN)
      • 11:35
        Linear Collider Detector Status 45m
        Speaker: Hitoshi Yamamoto (Tohoku University)
      • 12:20
        Lunch 1h 40m
      • 14:00
        LCB Subcommittee 1 on Governance, etc. 30m
        Speaker: Sachio Komamiya (University of Tokyo)
      • 14:30
        LCB Subcommittee 2 on an International Agreement for the ILC Project 10m
        Speaker: Sachio Komamiya (University of Tokyo)
      • 14:40
        Regional Reports (3x10) 30m
        Speakers: Francois Le Diberder (LAL), Harry Weerts (ANL), Prof. Jie GAO (IHEP, Beijing, China), Lenny Rivkin (PSI)
        Slides
      • 15:10
        Break 20m
      • 15:30
        Future LCB Meetings 5m
      • 15:35
        Any Other Business 25m
    • 16:00 → 19:30
      Closed meeting : International Committee for Future Accelerators (ICFA)

      Closed meeting: restricted to ICFA members

      • 16:00
        FALC Report 20m
        Speaker: Yasuhiro Okada (KEK)
      • 16:20
        ILC Progress in Japan 20m
        Speaker: Atsuto Suzuki (KEK)
      • 16:40
        US HEP Future Planning 30m
        Speaker: Nigel Lockyer (Fermilab)
      • 17:10
        Global Planning for HEP, including a 100 TeV Collider 1h
      • 18:10
        ICFA Seminar 20m
        Speaker: Yifang Wang (IHEP/Beijing)
      • 18:30
        Linear Collider School 10m
      • 18:40
        Future ICFA Meetings 5m
      • 18:45
        Any Other Business 30m
  • Monday, 7 July
    • 09:00 → 10:30
      Opening Ceremony Auditorium 1 ()

      Auditorium 1
      Convener: Prof. Francisco Botella (IFIC)
      • 09:00
        CERN Director General 10m
        Speaker: Prof. Rolf-Dieter Heuer (CERN)
      • 09:10
        Valencian Ministry of Education, Culture and Sports 10m
        Speaker: Mrs. Maria José Catalá
      • 09:20
        Spanish Secretary of State for Research, Development and Innovation 10m
        Speaker: Dr. Carmen Vela (MICIN)
      • 09:30
        Inflationary Cosmology and Particle Physics 45m
        Speaker: Prof. Alan Guth (Massachusetts Institute of Technology)
        Slides
    • 10:30 → 10:45
      Coffee 15m
    • 10:45 → 13:45
      Plenary Session Auditorium 1 ()

      Auditorium 1

      Allocated time includes 5' for questions

      Convener: Prof. Teresa Dova (Univ. Nacional de La Plata)
      • 10:45
        Physics of the Brout-Englert-Higgs boson in ATLAS 30m
        Speaker: Dr. Marumi M. Kado (LAL-Orsay (France))
        Slides
      • 11:15
        Physics of the Brout-Englert-Higgs boson in CMS 30m
        Speaker: Dr. André David (CERN)
        CMS Higgs results released during ICHEP 2014
        Slides
        Twiki of CMS Higgs results
      • 11:45
        Physics of the Brout-Englert-Higgs boson: theory 30m
        Speaker: Prof. Christophe Grojean (ICREA/IFAE (Spain))
        Slides
      • 12:15
        Results on Physics Beyond the Standard Model from ATLAS and CMS 30m
        Speaker: Dr. Frank Wuerthwein (UC San Diego (United States))
        Slides
      • 12:45
        Physics Beyond the Standard Model: theory 30m
        Speaker: Dr. Marcela Carena (Fermilab (Unites States))
        Slides
      • 13:15
        Electroweak Physics: highlights of experimental results at low energy 30m
        Speaker: Dr. Roger Carlini (Jefferson Lab (United States))
        Slides
    • 13:45 → 15:00
      Lunch 1h 15m
    • 15:00 → 17:30
      Plenary Session Auditorium 1

      Auditorium 1

      Allocated time includes 5' for questions

      Convener: Prof. Marko Mikuz (Uni. Ljubliana)
      • 15:00
        Electroweak Physics: highlights of experimental results from hadron colliders 30m
        Speaker: Dr. Jeffrey Berryhill (Fermilab (United States))
        Slides
      • 15:30
        Highlights of Tevatron results 30m
        Speaker: Dr. Gregorio Bernardi (LPNHE-Paris 6&7/CNRS-IN2P3 (France))
        Paper
        Slides
      • 16:00
        Understanding electroweak physics in the Standard Model and beyond 30m
        Speaker: Dr. Ayres Freitas (University of Pittsburgh)
        Paper
        Slides
      • 16:30
        Top quark physics at LHC 30m
        Speaker: Dr. Tancredi Carli (CERN)
        Slides
      • 17:00
        Top-quark physics --- Theory status 30m
        Speaker: Prof. Peter Uwer (Humboldt-Universität zu Berlin (Germany))
        Slides
    • 17:30 → 18:00
      Coffee 30m
    • 18:00 → 20:20
      Future accelerator facilities and open discussion Auditorium 1 ()

      Auditorium 1

      Participants:
      S. Bertolucci - CERN
      N. Lockyer - Fermilab
      A. Suzuki - KEK
      Y. Wang - IHEP

      a) how should we balance between the large and long term projects and emerging new ideas 
b) how can we cope with needs for local research activities while large facilities require global resources 
c) how will the LHC results from the coming run at 13 TeV affect the current plans for the future facilities
      Convener: Prof. Tatsuya Nakada (EPFL)
      • 18:00
        Overview and scope of the session 10m
        Speaker: Prof. Tatsuya Nakada (EPFL)
        Slides
      • 18:10
        Regional strategies and roadmaps. Community vision: Americas 20m
        Speaker: Prof. Ian Shipsey (University of Purdue)
        Slides
      • 18:30
        Regional strategies and roadmaps. Community vision: Asia 20m
        Speaker: Prof. Mitsuaki Nozaki (KEK)
        Slides
      • 18:50
        Regional strategies and roadmaps. Community vision: Europe 20m
        Speaker: Prof. Manfred Krammer (HEPHY-Vienna)
        Slides
      • 19:10
        Round table with regional representatives and laboratory directors (CERN-S.Bertolucci, Fermilab-N. Lockyer, IHEP-Y. Wang, KEK-A. Suzuki) 50m
    • 20:45 → 20:50
      Bus departures from Congress Palace to "Huerto de Santa María" 5m
    • 21:00 → 23:30
      Conference Dinner at "Huerto de Santa María"
  • Tuesday, 8 July
    • 08:30 → 11:00
      Plenary Session Auditorium 1 ()

      Auditorium 1

      Allocated time includes 5' for questions

      Convener: Prof. Gustavo Castelo-Branco (CFTP Lisbon)
      • 08:30
        Rare decays in quark flavour physics 30m Auditorium 1

        Auditorium 1
        Speaker: Dr. Johannes Albrecht (TU Dortmund (Germany))
        Slides
      • 09:00
        CP-Violation and B-Physics: experimental results and future prospects 30m Auditorium 1

        Auditorium 1
        Speaker: Prof. Thomas E Browder (University of Hawaii (United States))
        Slides
      • 09:30
        Looking for physics beyond the SM via the Flavour Window 30m Auditorium 1

        Auditorium 1
        Speaker: Prof. Gino Isidori (University of Zurich (Switzerland))
        Slides
      • 10:00
        Highlights of Heavy Ions experimental results 30m Auditorium 1

        Auditorium 1
        Speaker: Prof. Johannes P. Wessels (Univ. Muenster (Germany))
        Slides
      • 10:30
        Heavy Ions Physics: theory 30m Auditorium 1

        Auditorium 1
        Speaker: Prof. Charles Gale (McGill Univ. Montreal (Canada))
        Slides
    • 11:00 → 11:30
      Coffee 30m
    • 11:30 → 13:30
      Plenary Session Auditorium 1 ()

      Auditorium 1

      Allocated time includes 5' for questions

      Convener: Prof. Soo-Bong Kim (Univ. Seoul)
      • 11:30
        QCD and hadron physics: theory 30m
        Speaker: Prof. Paolo Nason (INFN Milano-Bicocca (Italy))
        Slides
      • 12:00
        Probing the strong interactions: highlights of experimental results 30m
        Speaker: Dr. Chiara Roda (University and INFN of Pisa (Italy))
        Slides
      • 12:30
        Hadron Spectroscopy 30m
        Speaker: Dr. Haiping Peng (Univ. of Science and Technology (China))
        Slides
      • 13:00
        Progress in Lattice QCD: a new landscape 30m
        Speaker: Prof. Aida X El-Khadra (University of Illinois (United States))
        Slides
    • 13:30 → 15:00
      Lunch 1h 30m
    • 15:00 → 18:10
      Plenary Session Auditorium 1

      Auditorium 1

      Allocated time includes 5' for questions

      Convener: Prof. Chang Kee Jung (Stony Brook)
      • 15:00
        Neutrino properties: Highlights of non-oscillation results 30m
        Speaker: Prof. Manfred Lindner (MPI Heidelberg, (Germany))
        Slides
      • 15:30
        Neutrino experiments: highlights of accelerator and reactor results 30m
        Speaker: Dr. Marco Zito (IRFU-Saclay)
        Slides
      • 16:00
        Neutrino Phenomenology: Highlights of oscillation results and future prospects 30m
        Speaker: Dr. Srubabati Goswami (Physical Research Laboratory (PRL) , (India))
        Slides
      • 16:30
        Direct Dark Matter searches 30m
        Speaker: Dr. Henrique Araujo (Imperial College London (United Kingdom))
        Slides
      • 17:00
        Ground based cosmic ray experiments: highlights of recent results 20m
        Speaker: Prof. James M. Matthews (Louisiana State University (United States))
        Slides
      • 17:20
        Space based cosmic ray experiments: highlights of recent results 20m
        Speaker: Dr. Javier Berdugo (CIEMAT)
        Slides
      • 17:40
        Gamma ray experiments: highlights of recent results 30m
        Speaker: Prof. Christian Stegmann (DESY (Germany))
        Slides
    • 18:10 → 18:30
      Coffee 20m
    • 18:30 → 21:00
      Industrial opportunities in future High Energy Physics projects Salón Multiusos 2

      Salón Multiusos 2
      Conveners: Mr. Fco. Javier Cáceres (INEUSTAR), Mr. Manuel Moreno (CDTI)
      • 18:30
        Future new projects and windows of opportunites at CERN 5m
        Speaker: Dr. José Miguel Jiménez (CERN)
      • 18:35
        Perspectives in China for future experiments in particle Physics 5m
        Speaker: Prof. Jie GAO (IHEP, Beijing, China)
        Slides
      • 18:40
        The International Linear Collider in Japan 5m
        Speaker: Prof. Akira Yamamoto (KEK/CERN)
      • 18:45
        Prospects for future accelerator based experiments in the US 5m
        Speaker: Dr. Stephen Peggs (BNL)
      • 18:50
        Accelerator activities in Spain. CONECTA: Spanish Coordination on Accelerator's Science and Technology 5m
        Speaker: Dr. José Manuel Pérez (CIEMAT)
      • 18:55
        Open discussion on industrial opportunities in future projects of particle physics 2h 5m
    • 18:30 → 20:15
      Special Session on Cosmology and Particle Physics Auditorium 1

      Auditorium 1
      Convener: Prof. Enrique Fernández (IFAE Barcelona)
      • 18:30
        A detection of degree scale B-mode polarization with BICEP2 30m
        Speaker: Dr. Roger O'Brient (California Institute of Technology (United States))
        Slides
      • 19:00
        Cosmological constraints from Planck 30m
        Speaker: Prof. E. Martinez-Gonzalez (Instituto de Fisica de Cantabria (Spain))
        Slides
  • Wednesday, 9 July
    • 08:30 → 11:00
      Plenary Session Auditorium 1 ()

      Auditorium 1

      Allocated time includes 5' for questions

      Convener: Prof. James Brau (Univ. Oregon)
      • 08:30
        Poster prizes. Elsevier young scientist awards 10m
        Speaker: Dr. Eleonora Presani (ELS-AMS)
        Slides
      • 08:40
        IUPAP-C11 report 20m
        Speaker: Dr. Heidi Schellman (Northwestern University (United States))
        Slides
      • 09:00
        ICFA report 20m
        Speaker: Prof. Joachim Mnich (DESY)
        Slides
      • 09:20
        IUPAP young scientist prize winner on theoretical high energy physics 20m
        Speaker: Dr. Claude Duhr (University of Durham (United Kingdom))
        Slides
      • 09:40
        IUPAP young scientist prize winner on experimenal high energy physics 20m
        Speaker: Dr. Kerstin Tackmann (DESY (Germany))
        Slides
      • 10:00
        Formal Theory developments 30m
        Speaker: Dr. Jose L. F. Barbón (IFT UAM/CSIC (Spain))
        Slides
      • 10:30
        Very High Energy Neutrinos 30m
        Speaker: Dr. Alexander Kappes (ECAP, Univ. of Erlangen-Nürnberg (Germany))
        Slides
    • 11:00 → 11:30
      Coffee 30m
    • 11:30 → 13:30
      Plenary Session Auditorium 1 ()

      Auditorium 1

      Allocated time includes 5' for questions

      Convener: Prof. Geoffrey Norman Taylor (Univ. Melbourne)
      • 11:30
        Computing in High Energy Physics 30m
        Speaker: Dr. Richard Mount (SLAC National Accelerator Laboratory (United States))
        Slides
      • 12:00
        Detector R&D in Particle Physics 30m
        Speaker: Prof. P. P. Allport (University of Liverpool (United Kingdom))
        Slides
      • 12:30
        Energy-frontier colliders - the road ahead 30m
        Speaker: Dr. N. J. Walker (DESY Hamburg (Germany))
        Slides
      • 13:00
        Education, Communication and Outreach 30m
        Speaker: Dr. Hans Peter Beck (Universitat Bern (Switzerland))
        Slides
    • 13:30 → 15:00
      Lunch 1h 30m
    • 15:00 → 17:30
      Closing Auditorium 1 ()

      Auditorium 1
      Convener: Prof. Victor Matveev (JINR,Dubna and Russian Academy of Sciences, Moscow)
      • 15:00
        Experimental highlights of ICHEP 2014 1h
        Speaker: Prof. Young-Kee Kim (University of Chicago (United States))
        Slides
      • 16:00
        Theoretical highlights of ICHEP 2014. Outlook 1h
        Speaker: Prof. Antonio Pich
        Paper
        Slides
      • 17:00
        Farewell 10m
        Speaker: Prof. Juan Antonio Fuster Verdu (IFIC (Instituto de Fisica Corpuscular))
        Slides
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