Measurement of the tt̅W and tt̅Z Production Cross Sections in pp Collisions at √s̅=8 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.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.accessioned2016-07-06T18:59:58Z
dc.date.available2016-07-06T18:59:58Z
dc.date.created2015-11en_US
dc.date.issued2015-11en_US
dc.description.abstractThe production cross sections of top-quark pairs in association with massive vector bosons have been measured using data from pp collisions at √s̅ = 8 TeV. The dataset corresponds to an integrated luminosity of 20.3 fb⁻¹ collected by the ATLAS detector in 2012 at the LHC. Final states with two, three or four leptons are considered. A fit to the data considering the tt̅W and tt̅Z processes simultaneously yields a significance of 5.0σ (4.2σ) over the background-only hypothesis for tt̅W (tt̅Z) production. The measured cross sections are σ_{tt̅W} = 369_(-91)^(+100) fb and σ_{tt̅Z} = 176_{-52}^{+58} fb. The background-only hypothesis with neither tt̅W nor tt̅Z production is excluded at 7.1σ. All measurements are consistent with next-to-leading-order calculations for the tt̅W and tt̅Z processes.en_US
dc.identifier.bibliographicCitationAad, G., B. Abbott, J. Abdallah, O. Abdinov, et al. 2015. "Measurement of the tt̅W and tt̅Z production cross sections in pp collisions at √s̅=8 TeV with the ATLAS detector." Journal of High Energy Physics 2015(11), doi:10.1007/JHEP11(2015)172.en_US
dc.identifier.issn1029-8479en_US
dc.identifier.issue11en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/4896
dc.identifier.volume2015en_US
dc.language.isoenen_US
dc.publisherSpringeren_US
dc.relation.urihttp://dx.doi.org/10.1007/JHEP11(2015)172
dc.rightsCC BY 4.0 (Attribution)en_US
dc.rights©2015 The Authorsen_US
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en_US
dc.sourceJournal of High Energy Physics
dc.subjectElectroweak interactionsen_US
dc.subjectHadrons--Scatteringen_US
dc.subjectTop quark modelsen_US
dc.subjectPartonsen_US
dc.subjectHadron collidersen_US
dc.subjectMonte Carlo methodsen_US
dc.subjectVertex functionsen_US
dc.titleMeasurement of the tt̅W and tt̅Z Production Cross Sections in pp Collisions at √s̅=8 TeV with the ATLAS Detectoren_US
dc.type.genreArticleen_US

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