Search for direct top squark pair production in events with a Higgs or Z boson, and missing transverse momentum in root s=13 TeV pp collisions with the ATLAS detector

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dc.WoS.categoriesPhysics, Particles & Fieldsen_US
dc.authorid0000-0001-5050-8441en_US
dc.contributor.authorÇelebi, Emre
dc.contributor.authorÇetin, Serkant Ali
dc.date.accessioned2020-12-25T08:47:53Z
dc.date.available2020-12-25T08:47:53Z
dc.date.issued2017-08-01
dc.departmentFakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Enerji Sistemleri Mühendisliği Bölümüen_US
dc.description.abstractA search for direct top squark pair production resulting in events with either a same-flavour opposite-sign dilepton pair with invariant mass compatible with a Z boson or a pair of jets compatible with a Standard Model (SM) Higgs boson (h) is presented. Requirements on the missing transverse momentum, together with additional selections on leptons, jets, jets identified as originating from b-quarks are imposed to target the other decay products of the top squark pair. The analysis is performed using proton-proton collision data at root s = 13 TeV collected with the ATLAS detector at the LHC in 20152016, corresponding to an integrated luminosity of 36.1 fb(-1). No excess is observed in the data with respect to the SM predictions. The results are interpreted in two sets of models. In the first set, direct production of pairs of lighter top squarks ((t) over tilde (1)) with long decay chains involving Z or Higgs bosons is considered. The second set includes direct pair production of the heavier top squark pairs ((t) over tilde (2)) decaying via (t) over tilde (2) -> Z (t) over tilde (1) or (t) over tilde (2) -> h (t) over tilde (1). The results exclude at 95% confidence level (t) over tilde (2) and (t) over tilde (1) masses up to about 800 GeV, extending the exclusion region of supersymmetric parameter space covered by previous LHC searches.en_US
dc.fullTextLevelFull Texten_US
dc.identifier.doi10.1007/JHEP08(2017)006
dc.identifier.scopus2-s2.0-85026906104en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://hdl.handle.net/11411/3002
dc.identifier.urihttps://doi.org/10.1007/JHEP08(2017)006
dc.identifier.wosWOS:000406886200006en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.issue8en_US
dc.language.isoenen_US
dc.nationalInternationalen_US
dc.numberofauthors200+en_US
dc.publisherSPRINGERen_US
dc.relation.ispartofJOURNAL OF HIGH ENERGY PHYSICSen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectBeyond Standard Modelen_US
dc.subjectHadron-Hadron scattering (experiments)en_US
dc.subjectHiggs physicsen_US
dc.titleSearch for direct top squark pair production in events with a Higgs or Z boson, and missing transverse momentum in root s=13 TeV pp collisions with the ATLAS detector
dc.typeArticle

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