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dc.contributor.authorÇetin, Serkant Ali
dc.contributor.authorATLAS Collaboration
dc.date.accessioned2016-03-29T06:48:05Z
dc.date.available2016-03-29T06:48:05Z
dc.date.issued2015-08-31
dc.identifier.citationAad, G., Abbott, B., Abdallah, J., Abdinov, O., Aben, R., Abolins, M. ... ATLAS Collaboration. (2015). Search for production of vector-like quark pairs and of four top quarks in the lepton-plus-jets final state in pp collisions at root s = 8 TeV with the ATLAS detector. Journal of High Energy Physics, 2015(8), 1-86. http://dx.doi.org/10.1007/JHEP08(2015)105en_US
dc.identifier.issn1126-6708
dc.identifier.other105 (Scopus)
dc.identifier.urihttp://dx.doi.org/10.1007/JHEP08(2015)105
dc.identifier.urihttp://hdl.handle.net/11376/2493
dc.descriptionÇetin, Serkant Ali (Dogus Author)en_US
dc.description.abstractA search for pair production of vector-like quarks, both up-type (T) and down-type (B), as well as for four-top-quark production, is presented. The search is based on pp collisions at (Formula presented.) TeV recorded in 2012 with the ATLAS detector at the CERN Large Hadron Collider and corresponding to an integrated luminosity of 20.3 fb−1. Data are analysed in the lepton-plus-jets final state, characterised by an isolated electron or muon with high transverse momentum, large missing transverse momentum and multiple jets. Dedicated analyses are performed targeting three cases: a T quark with significant branching ratio to a W boson and a b-quark (TT¯→Wb+X), and both a T quark and a B quark with significant branching ratio to a Higgs boson and a third-generation quark (TT¯→Ht+XandBB¯→Hb+X respectively). No significant excess of events above the Standard Model expectation is observed, and 95% CL lower limits are derived on the masses of the vector-like T and B quarks under several branching ratio hypotheses assuming contributions from T → Wb, Zt, Ht and B → Wt, Zb, Hb decays. The 95% CL observed lower limits on the T quark mass range between 715 GeV and 950 GeV for all possible values of the branching ratios into the three decay modes, and are the most stringent constraints to date. Additionally, the most restrictive upper bounds on four-top-quark production are set in a number of new physics scenarios.en_US
dc.language.isoengen_US
dc.publisherSpringeren_US
dc.relation.isversionof10.1007/JHEP08(2015)105en_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectATLASen_US
dc.subjectTop Quark Pairen_US
dc.subjectHadron-Hadron Scatteringen_US
dc.subjectLarge Hadron Collideren_US
dc.titleSearch for production of vector-like quark pairs and of four top quarks in the lepton-plus-jets final state in pp collisions at root s = 8 TeV with the ATLAS detectoren_US
dc.typearticleen_US
dc.relation.journalJournal of High Energy Physicsen_US
dc.contributor.departmentDoğuş Üniversitesi, Fen Edebiyat Fakültesi, Fizik Bölümüen_US
dc.contributor.authorIDTR3959en_US
dc.identifier.volume2015en_US
dc.identifier.issue8en_US
dc.identifier.startpage1en_US
dc.identifier.endpage86en_US


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