Search for Pair and Single Production of New Heavy Quarks that Decay to a Z Boson and a Third-Generation Quark in pp Collisions at √s = 8 TeV with 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.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.authorAbi, B.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.accessioned2015-01-28T20:34:30Z
dc.date.available2015-01-28T20:34:30Z
dc.date.created2014-11-19en_US
dc.date.issued2014-11-19en_US
dc.date.issued2014-11-19
dc.description.abstractA search is presented for the production of new heavy quarks that decay to a Z boson and a third-generation Standard Model quark. In the case of a new charge +2/3 quark (T), the decay targeted is T → Zt, while the decay targeted for a new charge -1/3 quark (B) is B → Zb. The search is performed with a dataset corresponding to 20.3 fb⁻¹ of pp collisions at √s = 8TeV recorded in 2012 with the ATLAS detector at the CERN Large Hadron Collider. Selected events contain a high transverse momentum Z boson candidate reconstructed from a pair of oppositely charged same-flavor leptons (electrons or muons), and are analyzed in two channels defined by the absence or presence of a third lepton. Hadronic jets, in particular those with properties consistent with the decay of a b-hadron, are also required to be present in selected events. Different requirements are made on the jet activity in the event in order to enhance the sensitivity to either heavy quark pair production mediated by the strong interaction, or single production mediated by the electroweak interaction. No significant excess of events above the Standard Model expectation is observed, and lower limits are derived on the mass of vector-like T and B quarks under various branching ratio hypotheses, as well as upper limits on the magnitude of electroweak coupling parameters.en_US
dc.identifier.bibliographicCitationAad, G., B. Abbott, J. Abdallah, S. Abdel Khalek, et al. 2014. "Search for pair and single production of new heavy quarks that decay to a Z boson and a third-generation quark in pp collisions at root s=8 TeV with the ATLAS detector." Journal of High Energy Physics 11(104), doi:10.1007/JHEP11(2014)104en_US
dc.identifier.issn1029-8479en_US
dc.identifier.issue104en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/4292
dc.identifier.volume11
dc.language.isoen_USen_US
dc.publisherSpringeren_US
dc.relation.urihttp://dx.doi.org/10.1007/JHEP11(2014)104
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.subjectParticles (Nuclear physics)en_US
dc.subjectJets (Nuclear physics)en_US
dc.subjectZ bosonsen_US
dc.subjectQuarksen_US
dc.subjectLeptons (Nuclear physics)en_US
dc.titleSearch for Pair and Single Production of New Heavy Quarks that Decay to a Z Boson and a Third-Generation Quark in pp Collisions at √s = 8 TeV with the ATLAS Detectoren_US
dc.typeTexten_US
dc.type.genreArticleen_US

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Izen, Joseph M.
Lou, Xinchou
NSM Staff-Student Research