Measurement of the Higgs boson production rate in association with top quarks in final states with electrons, muons, and hadronically decaying tau leptons at √s=13Te

Basit Öğe Kaydı
dc.contributor.authorSirunyan, A.M.
dc.contributor.authorTumasyan, A.
dc.contributor.authorAdam, W.
dc.contributor.authorBergauer, T.
dc.contributor.authorDragicevic, M.
dc.contributor.authorErö, J.
dc.contributor.authorValle, A. Escalante Del
dc.date.accessioned2025-03-23T19:16:40Z
dc.date.available2025-03-23T19:16:40Z
dc.date.issued2021
dc.departmentSinop Üniversitesi
dc.description.abstractThe rate for Higgs (H) bosons production in association with either one (t H) or two (t t ¯ H) top quarks is measured in final states containing multiple electrons, muons, or tau leptons decaying to hadrons and a neutrino, using proton–proton collisions recorded at a center-of-mass energy of 13Te by the CMS experiment. The analyzed data correspond to an integrated luminosity of 137fb-1. The analysis is aimed at events that contain H → W W , H → τ τ , or H → Z Z decays and each of the top quark(s) decays either to lepton+jets or all-jet channels. Sensitivity to signal is maximized by including ten signatures in the analysis, depending on the lepton multiplicity. The separation among t H , t t ¯ H , and the backgrounds is enhanced through machine-learning techniques and matrix-element methods. The measured production rates for the t t ¯ H and t H signals correspond to 0.92±0.19(stat)-0.13+0.17(syst) and 5.7±2.7(stat)±3.0(syst) of their respective standard model (SM) expectations. The corresponding observed (expected) significance amounts to 4.7 (5.2) standard deviations for t t ¯ H , and to 1.4 (0.3) for t H production. Assuming that the Higgs boson coupling to the tau lepton is equal in strength to its expectation in the SM, the coupling yt of the Higgs boson to the top quark divided by its SM expectation, κt=yt/ytSM, is constrained to be within - 0.9 < κt< - 0.7 or 0.7 < κt< 1.1 , at 95% confidence level. This result is the most sensitive measurement of the t t ¯ H production rate to date. © 2021, CERN for the benefit of the CMS collaboration.
dc.description.sponsorshipCPAN
dc.description.sponsorshipERC PUT
dc.description.sponsorshipEU-ESF
dc.description.sponsorshipExcellence of Science, (30820817)
dc.description.sponsorshipMSES
dc.description.sponsorshipMoER
dc.description.sponsorshipPCTI
dc.identifier.doi10.1140/epjc/s10052-021-09014-x
dc.identifier.issn1434-6044
dc.identifier.issue4
dc.identifier.scopus2-s2.0-85105163177
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1140/epjc/s10052-021-09014-x
dc.identifier.urihttps://hdl.handle.net/11486/4176
dc.identifier.volume81
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherSpringer Science and Business Media Deutschland GmbH
dc.relation.ispartofEuropean Physical Journal C
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_Scopus_20250323
dc.titleMeasurement of the Higgs boson production rate in association with top quarks in final states with electrons, muons, and hadronically decaying tau leptons at √s=13Te
dc.typeArticle

Dosyalar

Koleksiyon

Scopus İndeksli Yayınlar Koleksiyonu