Measurement of the Production of a W Boson in Association with a Charm Quark in pp Collisions at √s=7 TeV with the ATLAS Detector

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.authorAbdel Khalek, S.en_US
dc.contributor.authorAbdinov, O.en_US
dc.contributor.authorAben, R.en_US
dc.contributor.authorIzen, Joseph M.en_US
dc.contributor.authorLeyton, Michaelen_US
dc.contributor.authorLou, Xinchouen_US
dc.contributor.authorNamasivayam, Harisankaren_US
dc.contributor.authorReeves, Kendallen_US
dc.contributor.authorATLAS Collaborationen_US
dc.contributor.utdAuthorIzen, Joseph M.en_US
dc.contributor.utdAuthorLeyton, Michaelen_US
dc.contributor.utdAuthorNamasivayam, Harisankaren_US
dc.contributor.utdAuthorReeves, Kendallen_US
dc.contributor.utdAuthorLou, Xinchouen_US
dc.date.accessioned2014-10-01T21:11:19Z
dc.date.available2014-10-01T21:11:19Z
dc.date.created2014-05-16en_US
dc.date.issued2014-05-16en_US
dc.description.abstractThe production of a W boson in association with a single charm quark is studied using 4.6 fb⁻¹ of pp collision data at√s = 7 TeV collected with the ATLAS detector at the Large Hadron Collider. In events in which a W boson decays to an electron or muon, the charm quark is tagged either by its semileptonic decay to a muon or by the presence of a charmed meson. The integrated and differential cross sections as a function of the pseudorapidity of the lepton from the W-boson decay are measured. Results are compared to the predictions of next-to-leading-order QCD calculations obtained from various parton distribution function parameterisations. The ratio of the strange-to-down sea-quark distributions is determined to be 0.96₋{-0.30}^{+0.26} at Q² = 1.9 GeV², which supports the hypothesis of an SU(3)-symmetric composition of the light-quark sea. Additionally, the cross-section ratio σ(W⁺ +c̅) / σ(W⁻ +c) is compared to the predictions obtained using parton distribution function parameterisations with different assumptions about the s-s̅ quark asymmetry.en_US
dc.identifier.bibliographicCitationAad, G., T. Abajyan, B. Abbott, J. Abdallah, et al. 2014. "Measurement of the production of a W boson in association with a charm quark in pp collisions at √s=7 TeV with the ATLAS detector." Journal of High Energy Physics 5(68), doi:10.1007/JHEP05(2014)068en_US
dc.identifier.issn1029-8479en_US
dc.identifier.issue68en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/4046
dc.identifier.volume5en_US
dc.language.isoen_USen_US
dc.publisherSpringeren_US
dc.relation.urihttp://dx.doi.org/10.1007/JHEP05(2014)068
dc.rightsCC BY 4.0 (Attribution)en_US
dc.rights©2014 CERN for the benefit of the ATLAS Collaborationen_US
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en_US
dc.sourceJournal of High Energy Physics
dc.subjectJets (Nuclear physics)en_US
dc.subjectQuarksen_US
dc.subjectMuonsen_US
dc.subjectW bosonsen_US
dc.subjectCharmed particles (Nuclear physics)en_US
dc.titleMeasurement of the Production of a W Boson in Association with a Charm Quark in pp Collisions at √s=7 TeV with the ATLAS Detectoren_US
dc.typeTexten_US
dc.type.genreArticleen_US
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