Evidence for Single Top-Quark Production in the S-Channel in Proton-Proton Collisions at √s̅ = 8 TeV with the ATLAS Detector Using the Matrix Element Method

dc.contributor.VIAF250674117 (Izen, JM)en_US
dc.contributor.authorAad, G.en_US
dc.contributor.authorAbbott, B.en_US
dc.contributor.authorAbdallah, J.en_US
dc.contributor.authorAbdinov, O.en_US
dc.contributor.authorAben, R.en_US
dc.contributor.authorAbolins, M.en_US
dc.contributor.authorAbouZeid, O. S.en_US
dc.contributor.authorIzen, Joseph M.en_US
dc.contributor.authorLeyton, Michaelen_US
dc.contributor.authorMeirose, Bernharden_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.utdAuthorMeirose, Bernharden_US
dc.contributor.utdAuthorNamasivayam, Harisankaren_US
dc.contributor.utdAuthorReeves, Kendallen_US
dc.date.accessioned2017-11-10T23:18:13Z
dc.date.available2017-11-10T23:18:13Z
dc.date.created2016-03-08en_US
dc.date.issued2016-03-08en_US
dc.description.abstractThis Letter presents evidence for single top-quark production in the s-channel using proton-proton collisions at a centre-of-mass energy of 8 TeV with the ATLAS detector at the CERN Large Hadron Collider. The analysis is performed on events containing one isolated electron or muon, large missing transverse momentum and exactly two b-tagged jets in the final state. The analysed data set corresponds to an integrated luminosity of 20.3 fb⁻¹. The signal is extracted using a maximum-likelihood fit of a discriminant which is based on the matrix element method and optimized in order to separate single-top-quark s-channel events from the main background contributions, which are top-quark pair production and W boson production in association with heavy-flavour jets. The measurement leads to an observed signal significance of 3.2 standard deviations and a measured cross-section of σ_s = 4.8 ± 0.8(stat.)_{(-1.3)^(+1.6)}(syst.) pb, which is consistent with the Standard Model expectation. The expected significance for the analysis is 3.9 standard deviations.en_US
dc.identifier.bibliographicCitationAad, G., B. Abbott, J. Abdallah, O. Abdinov, et al. 2016. "Evidence for single top-quark production in the s-channel in proton-proton collisions at √s̅ = 8 TeV with the ATLAS detector using the Matrix Element Method." Physics Letters B 756, doi:10.1016/j.physletb.2016.03.017en_US
dc.identifier.issn0370-2693en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/5575
dc.identifier.volume756en_US
dc.language.isoenen_US
dc.publisherElsevier Science Bven_US
dc.relation.urihttp://dx.doi.org/10.1016/j.physletb.2016.03.017
dc.rightsCC BY 4.0 (Attribution)en_US
dc.rights©2016 CERN, for the ATLAS Collaborationen_US
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en_US
dc.sourcePhysics Letters B
dc.subjectHadron collidersen_US
dc.subjectPartonsen_US
dc.subjectTransverse momentumen_US
dc.subjectCross sections (Nuclear physics)en_US
dc.subjectLarge Hadron Collider (France and Switzerland)en_US
dc.subjectStandard Modelen_US
dc.subjectProton-proton interactionsen_US
dc.subjectW bosonsen_US
dc.subjectJets (Nuclear physics)en_US
dc.subjectTop Quarksen_US
dc.titleEvidence for Single Top-Quark Production in the S-Channel in Proton-Proton Collisions at √s̅ = 8 TeV with the ATLAS Detector Using the Matrix Element Methoden_US
dc.type.genrearticleen_US

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