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Top Quark Charge Asymmetry Measurement with ATLAS at the LHC

In the Standard Model top-antitop pair production is foreseen to be charge asymmetric in quark-antiquark annihilation at NLO. Although the dominant ttbar production mechanism in pp collisions at the LHC is gluon-gluon fusion, QCD predicts a small excess of top quarks produced at higher absolute rapi...

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Autor principal: Shaw, K
Lenguaje:eng
Publicado: 2013
Materias:
Acceso en línea:http://cds.cern.ch/record/1521387
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author Shaw, K
author_facet Shaw, K
author_sort Shaw, K
collection CERN
description In the Standard Model top-antitop pair production is foreseen to be charge asymmetric in quark-antiquark annihilation at NLO. Although the dominant ttbar production mechanism in pp collisions at the LHC is gluon-gluon fusion, QCD predicts a small excess of top quarks produced at higher absolute rapidities than antitops. The measurement of the top quark charge asymmetry is therefore an important test of QCD and is also sensitive to new physics. We present measurements of this asymmetry using data corresponding to an integrated luminosity of 1.04 f b−1 and 4.70 f b−1 of pp collisions at √s = 7 TeV collected by the ATLAS detector in the single lepton and dilepton channels respectively.
id cern-1521387
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2013
record_format invenio
spelling cern-15213872019-09-30T06:29:59Zhttp://cds.cern.ch/record/1521387engShaw, KTop Quark Charge Asymmetry Measurement with ATLAS at the LHCDetectors and Experimental TechniquesIn the Standard Model top-antitop pair production is foreseen to be charge asymmetric in quark-antiquark annihilation at NLO. Although the dominant ttbar production mechanism in pp collisions at the LHC is gluon-gluon fusion, QCD predicts a small excess of top quarks produced at higher absolute rapidities than antitops. The measurement of the top quark charge asymmetry is therefore an important test of QCD and is also sensitive to new physics. We present measurements of this asymmetry using data corresponding to an integrated luminosity of 1.04 f b−1 and 4.70 f b−1 of pp collisions at √s = 7 TeV collected by the ATLAS detector in the single lepton and dilepton channels respectively.ATL-PHYS-PROC-2013-062oai:cds.cern.ch:15213872013-02-28
spellingShingle Detectors and Experimental Techniques
Shaw, K
Top Quark Charge Asymmetry Measurement with ATLAS at the LHC
title Top Quark Charge Asymmetry Measurement with ATLAS at the LHC
title_full Top Quark Charge Asymmetry Measurement with ATLAS at the LHC
title_fullStr Top Quark Charge Asymmetry Measurement with ATLAS at the LHC
title_full_unstemmed Top Quark Charge Asymmetry Measurement with ATLAS at the LHC
title_short Top Quark Charge Asymmetry Measurement with ATLAS at the LHC
title_sort top quark charge asymmetry measurement with atlas at the lhc
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/1521387
work_keys_str_mv AT shawk topquarkchargeasymmetrymeasurementwithatlasatthelhc