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Top quark pair properties using the ATLAS detector at the LHC

The latest measurements of the properties of the top quark using the ATLAS experiment are presented. The top quark mass is one of the fundamental parameters of the Standard Model. A measurement based on a multi-dimensional template fit that can constrain the uncertainties on the energy measurements...

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Autor principal: Levy, Mark
Lenguaje:eng
Publicado: 2015
Materias:
Acceso en línea:http://cds.cern.ch/record/2050825
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author Levy, Mark
author_facet Levy, Mark
author_sort Levy, Mark
collection CERN
description The latest measurements of the properties of the top quark using the ATLAS experiment are presented. The top quark mass is one of the fundamental parameters of the Standard Model. A measurement based on a multi-dimensional template fit that can constrain the uncertainties on the energy measurements of jets is presented and combined with a measurement using dilepton events. In addition, novel measurements aiming to measure the mass in a well-defined scheme are presented. The top quark pair charge asymmetry is an asymmetry predicted to occur beyond leading-order QCD in the Standard Model, and may be significantly enhanced by the presence of new physics. The ttbar production charge asymmetry is measured inclusively and differentially using the 7 and 8 TeV ATLAS datasets. Making use of the large number of top quark pairs collected, we also present measurements of the spin correlation between top and anti-top quarks and discuss their sensitivities to new physics. The large number of top quark pair events is also used to measure the jet pull between the jets from the hadronic decay of the W boson, which is an observable that is sensitive to the QCD colour flow between the jets. A search for flavour changing neutral current processes in top quark decays is also presented.
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institution Organización Europea para la Investigación Nuclear
language eng
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spelling cern-20508252019-09-30T06:29:59Zhttp://cds.cern.ch/record/2050825engLevy, MarkTop quark pair properties using the ATLAS detector at the LHCParticle Physics - ExperimentThe latest measurements of the properties of the top quark using the ATLAS experiment are presented. The top quark mass is one of the fundamental parameters of the Standard Model. A measurement based on a multi-dimensional template fit that can constrain the uncertainties on the energy measurements of jets is presented and combined with a measurement using dilepton events. In addition, novel measurements aiming to measure the mass in a well-defined scheme are presented. The top quark pair charge asymmetry is an asymmetry predicted to occur beyond leading-order QCD in the Standard Model, and may be significantly enhanced by the presence of new physics. The ttbar production charge asymmetry is measured inclusively and differentially using the 7 and 8 TeV ATLAS datasets. Making use of the large number of top quark pairs collected, we also present measurements of the spin correlation between top and anti-top quarks and discuss their sensitivities to new physics. The large number of top quark pair events is also used to measure the jet pull between the jets from the hadronic decay of the W boson, which is an observable that is sensitive to the QCD colour flow between the jets. A search for flavour changing neutral current processes in top quark decays is also presented.ATL-PHYS-SLIDE-2015-636oai:cds.cern.ch:20508252015-09-09
spellingShingle Particle Physics - Experiment
Levy, Mark
Top quark pair properties using the ATLAS detector at the LHC
title Top quark pair properties using the ATLAS detector at the LHC
title_full Top quark pair properties using the ATLAS detector at the LHC
title_fullStr Top quark pair properties using the ATLAS detector at the LHC
title_full_unstemmed Top quark pair properties using the ATLAS detector at the LHC
title_short Top quark pair properties using the ATLAS detector at the LHC
title_sort top quark pair properties using the atlas detector at the lhc
topic Particle Physics - Experiment
url http://cds.cern.ch/record/2050825
work_keys_str_mv AT levymark topquarkpairpropertiesusingtheatlasdetectoratthelhc