Search for t t ¯ H production in the H → b b ¯ decay channel with leptonic t t ¯ decays in proton-proton collisions at √s=13 TeV

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dc.contributor.authorSirunyan, A.M.
dc.contributor.authorTumasyan, A.
dc.contributor.authorAdam, W.
dc.contributor.authorAmbrogi, F.
dc.contributor.authorAsilar, E.
dc.contributor.authorBergauer, T.
dc.contributor.authorBrandstetter, J.
dc.date.accessioned2025-03-23T19:16:32Z
dc.date.available2025-03-23T19:16:32Z
dc.date.issued2019
dc.departmentSinop Üniversitesi
dc.description.abstractA search is presented for the associated production of a standard model Higgs boson with a top quark-antiquark pair (t t ¯ H), in which the Higgs boson decays into a b quark-antiquark pair, in proton-proton collisions at a centre-of-mass energy s=13 TeV. The data correspond to an integrated luminosity of 35.9 fb −1 recorded with the CMS detector at the CERN LHC. Candidate t t ¯ H events are selected that contain either one or two electrons or muons from the t t ¯ decays and are categorised according to the number of jets. Multivariate techniques are employed to further classify the events and eventually discriminate between signal and background. The results are characterised by an observed t t ¯ H signal strength relative to the standard model cross section, μ = σ/σ SM, under the assumption of a Higgs boson mass of 125 GeV. A combined fit of multivariate discriminant distributions in all categories results in an observed (expected) upper limit on μ of 1.5 (0.9) at 95% confidence level, and a best fit value of 0.72 ± 0.24(stat) ± 0.38(syst), corresponding to an observed (expected) signal significance of 1.6 (2.2) standard deviations above the background-only hypothesis.[Figure not available: see fulltext.].
dc.description.sponsorshipAustrian Federal Ministry of Science
dc.description.sponsorshipDesarrollo e Innovación
dc.description.sponsorshipEU-ESF
dc.description.sponsorshipExcellence of Science, (30820817)
dc.description.sponsorshipHelsinki Institute of Physics
dc.description.sponsorshipInstitute for Studies in Theoretical Physics and Mathematics
dc.identifier.doi10.1007/JHEP03(2019)026
dc.identifier.issn1126-6708
dc.identifier.issue3
dc.identifier.scopus2-s2.0-85062644157
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1007/JHEP03(2019)026
dc.identifier.urihttps://hdl.handle.net/11486/4112
dc.identifier.volume2019
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherSpringer Verlag
dc.relation.ispartofJournal of High Energy Physics
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_Scopus_20250323
dc.subjectHadron-Hadron scattering (experiments)
dc.subjectHiggs physics
dc.subjectTop physics
dc.titleSearch for t t ¯ H production in the H → b b ¯ decay channel with leptonic t t ¯ decays in proton-proton collisions at √s=13 TeV
dc.typeArticle

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