Conveners
WG3+WG5 Joint Session: EW Physics and BSM + Heavy Flavours
- Martin Gorbahn (Liverpool University)
- Vanya Belyaev (ITEP Institute for Theoretical and Experimental Physics (RU))
- Krzysztof Turzynski (University of Warsaw)
- Anze Zupanc (Jozef Stefan Institute)
- Anna Kaczmarska (Polish Academy of Sciences (PL))
- Maxime Gouzevitch (Universite Claude Bernard-Lyon I (FR))
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Javier Fernandez Menendez (Universidad de Oviedo (ES))29/04/2014, 14:00WG3+WG5 Joint SessionOral presentationMeasurements of the inclusive top quark pair production cross section at 7 TeV and 8 TeV are presented, performed using CMS data collected in 2011 and 2012. The total cross section is measured in the lepton+jets, dilepton and fully hadronic channels, including the tau-dilepton and tau+jets modes. Indirect constraints on both the top quark mass and alpha_s are obtained through their relation to...Go to contribution page
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Prof. Patrick Skubic (University of Oklahoma)29/04/2014, 14:24WG3+WG5 Joint SessionOral presentationMeasurements of the differential 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 electron or muon in the final state and are carried out differentially in the reconstructed top transverse momentum and the invariant mass, rapidity and transverse momentum of...Go to contribution page
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Alberto Orso Maria Iorio (Universita e INFN (IT))29/04/2014, 14:48WG3+WG5 Joint SessionOral presentationMeasurements of single top quark production are presented, performed using CMS data collected in 2011 and 2012 at centre-of-mass energies of 7 and 8 TeV. The cross sections for the electroweak production of single top quarks in the t-channel and in association with W-bosons is measured and the results are used to place constraints on the CKM matrix element Vtb. In the t-channel the ratio of...Go to contribution page
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Caterina Monini (Centre National de la Recherche Scientifique (FR))29/04/2014, 15:12WG3+WG5 Joint SessionOral presentationMeasurements 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. 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 for the top...Go to contribution page
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Carl Schmidt (Michigan State University)29/04/2014, 15:36WG3+WG5 Joint SessionOral presentationWe study the uncertainties of the Higgs boson and ttbar production cross sections at the LHC arising from the uncertainties of the parton distribution functions (PDFs) and of the value of the strong coupling constant αs(MZ). We investigate the robustness of the commonly-used Hessian approach by comparing with the more-general Lagrange Multiplier method within the CTEQ-TEA global...Go to contribution page
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Ralph Schafer (Deutsches Elektronen-Synchrotron (DE))29/04/2014, 16:30WG3+WG5 Joint SessionOral presentationIn 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, 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...Go to contribution page
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Roberto Castello (Universite Catholique de Louvain (UCL) (BE))29/04/2014, 16:53WG3+WG5 Joint SessionOral presentationThe 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...Go to contribution page
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Riccardo Di Sipio (Universita e INFN (IT))29/04/2014, 17:16WG3+WG5 Joint SessionOral presentationProperties of the top quark are measured in proton-proton collisions data at 7 and 8 TeV. Measurements of the top-quark mass are presented. Other properties like the charge of the top quark, as well as of the polarization of W bosons in top quark decays to probe the structure of the Wtb-vertex are measured and constraints on anomalous couplings derived. A search for flavour changing...Go to contribution page
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Elvire Bouvier (Universite Claude Bernard-Lyon I (FR))29/04/2014, 17:39WG3+WG5 Joint SessionOral presentationMeasurements of the top quark mass are presented, obtained from CMS data collected in proton proton collisions at the LHC at centre-of-mass energies of 7 TeV and 8 TeV. The mass of the top quark is measured using several methods and channels, including the reconstructed invariant mass distribution of the top quark, an analysis of endpoint spectra as well as measurements from shapes of top...Go to contribution page
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Celine Degrande (UIUC)29/04/2014, 18:02WG3+WG5 Joint SessionOral presentationThe heaviest fermion is expected to couple strongly to new physics and appears therefore a natural probe in many BSM scenario. Moreover, top physics has now enter in a precision era thanks to the huge amount of top quarks produced at hadron colliders, advanced experimental methods and accurate theoretical predictions. In this talk, we will used effective field theory to search for heavy new...Go to contribution page