Conveners
Top-quark and ElectroWeak Physics: Top pair production
- Roberto Chierici (CNRS)
- Maria Jose Costa ()
Top-quark and ElectroWeak Physics: Single top production
- Roberto Chierici (CNRS)
- Maria Jose Costa ()
Top-quark and ElectroWeak Physics: Single top production
- Jessie Shelton (University of Illinois, Urbana-Champaign)
- Maria Jose Costa ()
Top-quark and ElectroWeak Physics: Top properties
- Maria Jose Costa ()
- Jessie Shelton (University of Illinois, Urbana-Champaign)
Top-quark and ElectroWeak Physics: Top mass
- Shinya Kanemura ()
- Roberto Chierici (CNRS)
Top-quark and ElectroWeak Physics: Single boson
- Maria Jose Costa ()
- Shinya Kanemura ()
Top-quark and ElectroWeak Physics: Single boson
- Roberto Chierici (CNRS)
- Jessie Shelton (University of Illinois, Urbana-Champaign)
Top-quark and ElectroWeak Physics: Multi-boson
- Roberto Chierici (CNRS)
- Jessie Shelton (University of Illinois, Urbana-Champaign)
Top-quark and ElectroWeak Physics: Multi-boson and tau
- Jessie Shelton (University of Illinois, Urbana-Champaign)
- Shinya Kanemura ()
Top-quark and ElectroWeak Physics: Perspectives and future
- Shinya Kanemura ()
- Jessie Shelton (University of Illinois, Urbana-Champaign)
Description
Allocated time includes time for questions as follows: 15 (13+2), 20 (17+3), 30 (25+5)
Dr.
Marco Guzzi
(DESY Hamburg)
03/07/2014, 11:00
Top-quark and ElectroWeak Physics
Oral presentation
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}....
Mr.
Timothée Theveneaux-Pelzer
(LPC Clermont-Ferrand - CNRS/IN2P3)
03/07/2014, 11:15
Top-quark and ElectroWeak Physics
Oral presentation
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...
Dr.
Antonio Limosani
(University of Sydney)
03/07/2014, 11:30
Top-quark and ElectroWeak Physics
Oral presentation
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...
Lukas Baeni
(ETH Zurich (CH))
03/07/2014, 11:45
Top-quark and ElectroWeak Physics
Oral presentation
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...
Douglas Benjamin
(Duke University)
03/07/2014, 12:00
Top-quark and ElectroWeak Physics
Oral presentation
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...
Mr.
Ivan Asin Cruz
(DESY (Germany))
03/07/2014, 12:15
Top-quark and ElectroWeak Physics
Oral presentation
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...
Dr.
Sandra Leone
(INFN Pisa)
03/07/2014, 12:30
Top-quark and ElectroWeak Physics
Oral presentation
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.
Prof.
Christian Schwanenberger
(University of Manchester)
03/07/2014, 12:50
Top-quark and ElectroWeak Physics
Oral presentation
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...
Mr.
Mario Merola
(INFN Sezione di Napoli (IT))
03/07/2014, 13:10
Top-quark and ElectroWeak Physics
Oral presentation
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...
Dr.
Dominic Hirschbuehl
(University Wuppertal)
03/07/2014, 15:00
Top-quark and ElectroWeak Physics
Oral presentation
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...
Dr.
Efe Yazgan
(Ghent University)
03/07/2014, 15:20
Top-quark and ElectroWeak Physics
Oral presentation
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...
Dr.
Chang-Seong Moon
(CNRS-Paris and INFN-Pisa)
03/07/2014, 15:35
Top-quark and ElectroWeak Physics
Oral presentation
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...
Prof.
Regina Demina
(Rochester)
03/07/2014, 15:55
Top-quark and ElectroWeak Physics
Oral presentation
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...
Dr.
Simon Head
(University of Birmingham)
03/07/2014, 16:15
Top-quark and ElectroWeak Physics
Oral presentation
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...
Dr.
Sergo Jindariani
(Fermi National Accelerator Lab., United States)
03/07/2014, 16:35
Top-quark and ElectroWeak Physics
Oral presentation
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...
Dr.
Raoul Rontsch
(Fermilab)
03/07/2014, 16:55
Top-quark and ElectroWeak Physics
Oral presentation
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...
Dr.
Mojtaba Mohammadi Najafabadi
(IPM)
03/07/2014, 17:10
Top-quark and ElectroWeak Physics
Oral presentation
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.
Jonathan Lewis
(Fermilab)
04/07/2014, 11:30
Top-quark and ElectroWeak Physics
Oral presentation
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 ...
Oleg Brandt
(U Heidelberg - KIP)
04/07/2014, 11:45
Top-quark and ElectroWeak Physics
Oral presentation
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...
Mr.
Kaven Yau Wong
(Physikalisches Institut Universitaet Bonn)
04/07/2014, 12:00
Top-quark and ElectroWeak Physics
Oral presentation
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...
Dr.
Rainer Wallny
(ETH Zürich, Switzerland)
04/07/2014, 12:20
Top-quark and ElectroWeak Physics
Oral presentation
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...
Ms.
Sayaka Kawabata
(Tohoku University)
04/07/2014, 12:40
Top-quark and ElectroWeak Physics
Oral presentation
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...
Dr.
Maria Aldaya Martin
(University of Hamburg, Germany)
04/07/2014, 12:55
Top-quark and ElectroWeak Physics
Oral presentation
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...
Uta Klein
(University of Liverpool)
04/07/2014, 13:10
Top-quark and ElectroWeak Physics
Oral presentation
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....
Dr.
Luca Stanco
(INFN - Padova)
04/07/2014, 15:00
Top-quark and ElectroWeak Physics
Oral presentation
A search for events ep-> ep Z0 has been performed in ep collisions at HERA using the ZEUS detector. The search is based on the entire HERA-I and HERA-II data set, amounting to 0.49 fb-1 of integrated luminosity. The Z0 was searched in the di-jet decay mode with elastic condition defined by etamax < 3, where etamax is defined as the pseudorapidity of the energy deposit in the calorimeter...
Dr.
Yusheng Wu
(University of Michigan; Institute Of Physics, Academia Sinica)
04/07/2014, 15:15
Top-quark and ElectroWeak Physics
Oral presentation
A measurement of the cross section for 4 lepton production near the Z resonance
is presented for sqrt(s) = 7 and 8 TeV proton-proton collisions recorded with the ATLAS experiment. The measurement is interpreted as a determination of the branching fraction for the Z boson decaying into 4 leptons and is found consistent with the expectation from the Standard Model. This result provides an...
Dr.
Ping Tan
(The Univ. of Iowa, United States)
04/07/2014, 15:30
Top-quark and ElectroWeak Physics
Oral presentation
Result of merged abstracts:
The production of W and Z bosons has been observed in pp collisions at a center-of-mass energy of 7 and 8 TeV using data collected in the CMS experiment. W events were selected containing an isolated, energetic electron or muon. Z events were selected containing a pair of isolated, energetic electrons or muons. We present studies of single and double differential...
Mr.
Saranya Ghosh
(Tata Institute of Fundamental Research (TIFR), Mumbai)
04/07/2014, 15:50
Top-quark and ElectroWeak Physics
Oral presentation
Measurements of the muon charge asymmetry in inclusive pp to WX production at sqrt(s)=7 TeV are presented. The data sample corresponds to an integrated luminosity of 4.7 inverse femtobarns recorded with the CMS detector at the LHC. With a sample of more than twenty million W to mu nu events, the statistical precision is greatly improved in comparison to previous measurements. These new results...
Dr.
Lars Hofer
(IFAE Barcelona)
04/07/2014, 16:05
Top-quark and ElectroWeak Physics
Oral presentation
We present results for the electroweak corrections to the hadronic production of a charged lepton pair in association with two jets and give detailed predictions for the LHC operating at 13 TeV. While corrections to the total cross section are small, we find significant non-uniform distortions in high-energy tails due to electroweak Sudakov logarithms.
Prof.
Antonella De Santo
(University of Sussex), Dr.
Emily Nurse
(University College London)
04/07/2014, 16:20
Top-quark and ElectroWeak Physics
Oral presentation
Measurement of production of vector bosons associated with two forward jets
is reported based on 20 fb-1 of data at sqrt(s) = 8 TeV recorded by the ATLAS
experiment. The measurement is performed in various fiducial volumes, sensitive
to QCD and Electroweak production mechanisms. The electroweak component for single Z boson production is extracted by a fit to the dijet invariant mass...
Dr.
Paolo Azzurri
(Univ. di Pisa e Sez. dell'INFN (Italy))
04/07/2014, 16:35
Top-quark and ElectroWeak Physics
Oral presentation
The measurement of the electroweak production cross section of a Z-boson with two jets in proton-proton collisions by the CMS experiment is presented. The cross section is measured in dielectron and dimuon final states and the measurement, combining different methods and channels is in agreement with the theory prediction.The hadronic activity in events with Z-boson production in association...
Dr.
Stephen Farry
(University of Liverpool)
04/07/2014, 16:50
Top-quark and ElectroWeak Physics
Oral presentation
The LHCb forward acceptance covers a range of rapidities not accessible by the other LHC experiments, allowing for complementary measurements. We report recent measurements of electroweak boson production, either inclusive, or in association with a jet or a D meson.
Mr.
Siqi Yang
(University of Science and Technology of China)
04/07/2014, 17:10
Top-quark and ElectroWeak Physics
Oral presentation
Result of merged abstracts:
We present charge asymmetry measurements from $W$ boson decays in both electron and muon channels, with 7.3 fb-1 to 9.7 fb-1 of Run II data collected by the D0 detector at the Fermilab Tevatron Collider. In the electron channel, we present the lepton asymmetry as a function of the electron transverse momentum and pseudo-rapidity out to |eta| \leq 3.2; we also give...
909.
A measurement of the electro-weak mixing angle and an indirect measurement of the W mass at CDF
Prof.
Arie Bodek
(University of Rochester)
05/07/2014, 09:00
Top-quark and ElectroWeak Physics
Oral presentation
We report on precision measurements of the electro-weak mixing angle and an indirect measurement of the W mass extracted from the forward-backward asymmetry of both e+e- and mu+mu- Drell-Yan events in the Z boson mass region at CDF.
Dr.
Hengne Li
(University of Virginia)
05/07/2014, 09:20
Top-quark and ElectroWeak Physics
Oral presentation
We present a measurement of the W boson mass using D0 Run II data. We select e + neutrino events consistent with a W decay and extract the W boson mass from the distributions of the electron transverse momentum, the neutrino transverse momentum, and the system transverse mass.
Dr.
Kristin Lohwasser
(DESY Zeuthen)
05/07/2014, 09:35
Top-quark and ElectroWeak Physics
Oral presentation
The measurement of the WW diboson production cross section in proton-proton interactions is reported from the ATLAS experiment. The analysis requires heavy bosons to decay leptonically, using ee, emu and mumu final states associated with large missing energy. The data are used to test the electroweak sector of the Standard Model and search for evidence for new phenomena. The cross section...
Mr.
Christian Gumpert
(IKTP, TU Dresden)
05/07/2014, 09:50
Top-quark and ElectroWeak Physics
Oral presentation
The measurement of production of same-sign WW bosons associated with two forward jets
is reported based on 20 fb-1 of data at sqrt(s) = 8 TeV recorded by the ATLAS experiment.
The measurements are performed in fiducial volumes, sensitive to QCD and Electroweak production mechanisms. The electroweak of component of same-sign WW production is extracted in a fiducial region with large rapidity...
Mr.
Phillip R. Dudero
(Texas Tech University)
05/07/2014, 10:05
Top-quark and ElectroWeak Physics
Oral presentation
Result of merged abstracts:
We present studies of WW, WZ and ZZ diboson production in pp collisions based on data recorded by the CMS detector at the LHC. These include precise measurements the production cross section of these processes at center-of-mass energies of 7 and 8TeV . The leptonic decay modes of the W and Z bosons are used. The results are interpreted in terms of constraints on...
Mr.
Philipp David ELLER
(ETH Zürich, Switzerland)
05/07/2014, 10:25
Top-quark and ElectroWeak Physics
Oral presentation
We present a measurement of the WZ and ZZ production cross sections in proton-proton collisions at 8 TeV in final states where one Z boson decays to b-tagged jets, while the other gauge boson, either W or Z, is detected through its leptonic decay. The results are based on data corresponding to an integrated luminosity of 18.9 /fb collected with the CMS detector at the Large Hadron Collider.
Dr.
Francisco Campanario
(IFIC, UV-CSIC)
05/07/2014, 10:40
Top-quark and ElectroWeak Physics
Oral presentation
These processes are important backgrounds to the measurement of the quartic gauge couplings of the Standard Model, to the Higgs signal via vector boson fusion, and to the search for signals of new physics beyond the Standard Model.
We present the first calculation of the next-to-leading order QCD corrections to the QCD-induced ZZ production in association with two jets at hadron colliders....
Prof.
Chara Petridou
(Aristotle University of Thessaloniki)
05/07/2014, 15:00
Top-quark and ElectroWeak Physics
Oral presentation
ATLAS measurements of multi-boson production processes involving combinations of W, Z and isolated photons are summarized. Measurements using 7 TeV and at 8 TeV p-p collision data are presented. The measurements are performed using leptonic decay modes, including the invisible decay Z--> nunu, as well as semileptonic channels. Differential and total cross sections are presented and are used to...
Mr.
Will Parker
(University of Wisconsin - Madison)
05/07/2014, 15:15
Top-quark and ElectroWeak Physics
Oral presentation
We present a measurement of the W boson pair production cross section in ppbar collisions at sqrt(s) = 1.96 TeV. The WW candidates are reconstructed from decays containing two charged leptons and two neutrinos, where the charged leptons are either electrons or muons. The measurement is performed using data collected by the CDF II detector from 9.7 fb−1 of integrated luminosity. The total and...
Dr.
Hisaki Hayashii
(Nara Women's University)
05/07/2014, 15:30
Top-quark and ElectroWeak Physics
Oral presentation
We present preliminary result of the measurement of Michel parameters in leptonic $\tau$ decays and search for the Electric Dipole Moment of the $\tau$ lepton using the world-largest $\tau$ data sample collected by the Belle detector at the KEKB collider. Michel parameters are extracted from $(\tau^{\mp}\to\ell^{\mp}\nu\nu$, $\tau^{\pm}\to\pi^{\pm}\pi^0\nu)$ and...
Dr.
Satoshi Mishima
(University of Rome "La Sapienza")
05/07/2014, 15:45
Top-quark and ElectroWeak Physics
Oral presentation
We present the updated global fits of the Standard Model and beyond to the electroweak precision data, taking into account the Higgs mass measurements at the LHC and recent progress in theoretical calculations. We use the up-to-date theoretical expressions for the partial widths of the Z boson which include the full two-loop fermionic electroweak contributions. From the global fits, we derive...
Mr.
Nacho Garcia
(PhD student)
05/07/2014, 16:00
Top-quark and ElectroWeak Physics
Oral presentation
Result of merged abstracts:
The future precision studies of the Standard Model require excellent knowledge of the top quark mass, to an accuracy of 100 MeV or better. This mass can be measured in a way that is free of any ambiguities from soft QCD by locating the threshold position for e+e- annihilation to top quarks, or, more precisely, the mass of the unstable 1S resonance. The...
Aura Rosca
(DESY)
05/07/2014, 16:20
Top-quark and ElectroWeak Physics
Oral presentation
After the discovery of the Higgs boson it became even more important to perform precision measurements and to search for deviations from the Standard Model predictions in the electroweak sector. A study of the measurement of trilinear gauge couplings is presented looking at the semi-leptonic W-pair production in e+e- annihilation at the ILC at centre-of-mass energies of 500 GeV and 1 TeV with...
Roberto Tenchini
(INFN Pisa)
05/07/2014, 16:35
Top-quark and ElectroWeak Physics
Oral presentation
As part of the Future Circular Collider study at CERN, the Future e+e- Circular Collider, FCC-ee, (formerly called TLEP) is a new generation collider, able to fit in a 80 to 100km tunnel, and able to deliver high luminosity in up to four interaction points from at least the Z peak to above the top pair threshold.
The luminosity at the Z pole and W pair threshold are over 2.5 and 1.2...
Dr.
Aleksandrs Aleksejevs
(Grenfell Campus of Memorial Univeristy)
05/07/2014, 16:50
Top-quark and ElectroWeak Physics
Oral presentation
The talk will outline the recent results on the two-loop electroweak contributions to the electron-electron scattering cross sections and asymmetries.
Of course, the two-loop corrections are strongly suppressed relative to the one-loop corrections, but they still contribute a few percent to the cross section, and even this small contribution cannot be ignored at for ultraprecision...
Dr.
Svetlana Barkanova
(Acadia University)
05/07/2014, 17:05
Top-quark and ElectroWeak Physics
Oral presentation
The best way to search for new physics is by using a diverse set of probes - not just experiments at the energy and the cosmic frontiers, but also the low-energy measurements relying on high precision and high luminosity.
One example of ultra-precision experiments is MOLLER planned at JLab, which will measure the parity-violating electron-electron scattering asymmetry and allow a...
Dr.
Hiroshi Yokoya
(University of Toyama)
05/07/2014, 17:20
Top-quark and ElectroWeak Physics
Oral presentation
It is known that the parity-odd (P-odd) observables without spin measurements are naive-T-odd at the same time, and the naive-T-odd distributions arise from the absorptive part of the scattering amplitudes.
We study the P-odd and naive-T-odd asymmetries at the one-loop level in W+jet production and top-quark radiative decay processes, and their observabilities at collider experiments such as...
