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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