Measurement of the Top Quark Pair Production Charge Asymmetry in Proton-Proton Collisions at √s̅ = 7 TeV Using the ATLAS Detector

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dc.contributor.ORCID0000-0003-0867-2189 (Lou, X)
dc.contributor.VIAF250674117 (Izen, JM)en_US
dc.contributor.VIAF250674117 (Izen, JM)
dc.contributor.authorAad, G.en_US
dc.contributor.authorAbajyan, T.en_US
dc.contributor.authorAbbott, B.en_US
dc.contributor.authorAbdallah, J.en_US
dc.contributor.authorKhalek, S. Abdelen_US
dc.contributor.authorAbdinov, O.en_US
dc.contributor.authorAben, R.en_US
dc.contributor.authorNamasivayam, Harisankaren_US
dc.contributor.authorIzen, Joseph M.en_US
dc.contributor.authorLou, Xinchouen_US
dc.contributor.authorReeves, Kendallen_US
dc.contributor.authorWong, Wei-Chengen_US
dc.contributor.authorHaleem, M.en_US
dc.contributor.authorATLAS Collaborationen_US
dc.contributor.utdAuthor|Ahsan, Mahsanaen_US
dc.contributor.utdAuthorIzen, Joseph M.en_US
dc.contributor.utdAuthorLou, Xinchouen_US
dc.contributor.utdAuthorReeves, Kendallen_US
dc.contributor.utdAuthorWong, Wei-Chengen_US
dc.contributor.utdAuthorNamasivayam, Harisankaren_US
dc.date.accessioned2014-05-29T18:43:59Z
dc.date.available2014-05-29T18:43:59Z
dc.date.created2014-02-25en_US
dc.date.issued2014-02-25en_US
dc.date.submitted2013-11-27en_US
dc.description.abstractThis paper presents a measurement of the top quark pair (tt̅) production charge asymmetry A_C using 4.7 fb−1 of proton-proton collisions at a centre-of-mass energy √s̅ = 7 TeV collected by the ATLAS detector at the LHC. A tt̅ -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 selected. A likelihood fit is used to reconstruct the tt̅ event kinematics. A Bayesian unfolding procedure is employed to estimate A_C at the parton-level. The measured value of the tt̅ production charge asymmetry is A_C = 0.006 ± 0.010, where the uncertainty includes both the statistical and the systematic components. Differential A_C measurements as a function of the invariant mass, the rapidity and the transverse momentum of the tt̅ system are also presented. In addition, A_C is measured for a subset of events with large tt̅ velocity, where physics beyond the Standard Model could contribute. All measurements are consistent with the Standard Model predictions.en_US
dc.identifier.bibliographicCitationAad, G., T. Aba jyan, B. Abbott, et al., 2014. "Measurement of the top quark pair production charge asymmetry in proton-proton collisions at √s̅ = 7 TeV using the ATLAS detector" Journal of High Energy Physics 2(107), doi:10.1007/JHEP02(2014)107en_US
dc.identifier.issn1029-8479en_US
dc.identifier.issue107en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/3548
dc.identifier.volume2
dc.language.isoen_USen_US
dc.publisherSpringeren_US
dc.relation.urihttp://dx.doi.org/10.1007/JHEP02(2014)107
dc.rightsCC BY 4.0 (Attribution)en_US
dc.rights©2014 CERN, for the ATLAS Collaborationen_US
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en_US
dc.sourceJournal of High Energy Physics
dc.subjectHadrons--Scatteringen_US
dc.subjectTransverse momentumen_US
dc.subjectLarge Hadron Collider (France and Switzerland)en_US
dc.subjectJets (Nuclear physics)en_US
dc.titleMeasurement of the Top Quark Pair Production Charge Asymmetry in Proton-Proton Collisions at √s̅ = 7 TeV Using the ATLAS Detectoren_US
dc.typeTexten_US
dc.type.genreArticleen_US

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Izen, Joseph M.
Lou, Xinchou