Evidence for four-top quark production in proton-proton collisions at √s=13 TeV

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dc.contributor.authorTumasyan, A.
dc.contributor.authorAdam, W.
dc.contributor.authorAndrejkovic, J. W.
dc.contributor.authorBergauer, T.
dc.contributor.authorChatterjee, S.
dc.contributor.authorDamanakis, K.
dc.contributor.authorDragicevic, M.
dc.date.accessioned2024-06-13T20:18:04Z
dc.date.available2024-06-13T20:18:04Z
dc.date.issued2023
dc.departmentİstanbul Gedik Üniversitesi
dc.description.abstractThe production of four top quarks (tt over bar tt over bar ) is studied with LHC proton-proton collision data samples collected by the CMS experiment at a center-of-mass energy of 13 TeV, and corresponding to integrated luminosities of up to 138 fb-1. Events that have no leptons (all-hadronic), one lepton, or two oppositesign leptons (where lepton refers only to prompt electrons or prompt muons) are considered. This is the first tt over bar tt over bar measurement that includes the all-hadronic final state. The observed significance of the tt over bar tt over bar signal in these final states of 3.9 standard deviations (1.5 expected) provides evidence for tt over bar tt over bar production, with a measured cross section of 36+12 signal significance is 4.0 standard deviations (3.2 expected). The combination returns an observed cross section of 17 +/- 4 (stat) +/- 3 (syst) fb, which is consistent with the standard model prediction.
dc.description.sponsorshipHungarian Academy of Sciences [K 124845, K 124850, K 128713, K 128786, K 129058, K 131991, K 133046, K 138136, K 143460, K 143477, 2020-2.2.1-ED-2021-00181, TKP2021-NKTA-64] ; Council of Science and Industrial Research ; Latvian Council of Science ; Ministry of Education and Science [2022/WK/14] ; National Science Cen-ter [Opus 2021/41/B/ST2/01369, 2021/43/B/ST2/01552, CEECIND/01334/2018] ; ERDF a way of making Europe [MDM-2017-0765] ; Programa Severo Ochoa del Principado de Asturias (Spain) ; Na-tional Science, Research and Innovation Fund via the Program Management Unit for Human Resources AMP ; Institutional Develop-ment, Research and Innovation [B05F650021] ; Kavli Foundation ; Nvidia Corporation ; Welch Foundation [C-1845] ; Weston Havens Foundation (USA)
dc.identifier.doi10.1016/j.physletb.2023.138076
dc.identifier.issn0370-2693
dc.identifier.issn1873-2445
dc.identifier.scopus2-s2.0-85165684059
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.physletb.2023.138076
dc.identifier.urihttps://hdl.handle.net/11501/1210
dc.identifier.volume844
dc.identifier.wosWOS:001118464700001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofPhysics Letters B
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectCMS
dc.subjectTop Quark
dc.titleEvidence for four-top quark production in proton-proton collisions at √s=13 TeV
dc.title.alternativeEvidence for four-top quark production in proton-proton collisions at s=13TeV
dc.typeArticle

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