Search for CP violation in t(t)over-bar H and tH production in multilepton channels 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.accessioned2024-06-13T20:17:47Z
dc.date.available2024-06-13T20:17:47Z
dc.date.issued2023
dc.departmentİstanbul Gedik Üniversitesi
dc.description.abstractThe charge-parity (CP) structure of the Yukawa interaction between the Higgs (H) boson and the top quark is measured in a data sample enriched in the t (t) over bar H and tH associated production, using 138 fb(-1) of data collected in proton-proton collisions at root s = 13TeV by the CMS experiment at the CERN LHC. The study targets events where the H boson decays via H -> WW or H -> WW or H ->tau tau and the top quarks decay via t -> Wb: the W bosons decay either leptonically or hadronically, and final states characterized by the presence of at least two leptons are studied. Machine learning techniques are applied to these final states to enhance the separation of CP-even from CP-odd scenarios. Twodimensional confidence regions are set on kappa(t) and (kappa) over tilde (t), which are respectively defined as the CP-even and CP-odd top-Higgs Yukawa coupling modifiers. No significant fractional CP-odd contributions, parameterized by the quantity |f (Htt)(CP)| are observed; the parameter is determined to be |f(CP)(Htt)| = 0.59 with an interval of (0.24, 0.81) at 68% confidence level. The results are combined with previous results covering the H -> ZZ and H -> gamma gamma decay modes, yielding two- and one-dimensional confidence regions on kappa(t) and (kappa) over tilde (t), while |f Htt CP | is determined to be |f(CP)(Htt)| = 0.28 with an interval of |f (Htt)(CP)| < 0.55 at 68% confidence level, in agreement with the standard model CP-even prediction of |f(CP)(Htt)| = 0.
dc.description.sponsorshipFWF; FNRS; FWO (Belgium); CNPq; CAPES; FAPERJ; FAPERGS; FAPESP (Brazil); BNSF (Bulgaria); MoST; NSFC (China); CSF (Croatia); RIF (Cyprus); SENESCYT (Ecuador); MoER, ERC PUT; ERDF (Estonia); Academy of Finland; MEC; CEA; CNRS/IN2P3 (France); BMBF; DFG; HGF (Germany); NKFIH (Hungary); DAE; DST; IPM; SFI (Ireland); INFN (Italy); NRF (Republic of Korea); MES (Latvia); MOE; UM (Malaysia); BUAP; CONACYT; UASLP-FAI (Mexico); MBIE (New Zealand); PAEC (Pakistan); FCT (Portugal); MESTD (Serbia); PCTI (Spain); MOSTR (Sri Lanka); Swiss Funding Agencies (Switzerland); NSTDA; TUBITAK; NASU (Ukraine); NSF; Marie-Curie programme; European Research Council; Horizon 2020 Grant [675440, 724704, 752730, 758316, 765710, 824093, 884104]; COST Action [CA16108]; Leventis Foundation; Alfred P. Sloan Foundation; Alexander von Humboldt Foundation; Belgian Federal Science Policy Office; Fonds pour la Formation a la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium); Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium); FWO (Belgium) under the Excellence of Science -EOS [30820817]; Beijing Municipal Science & Technology Commission [Z191100007219010]; Ministry of Education, Youth and Sports (MEYS) of the Czech Republic; Hellenic Foundation for Research and Innovation (HFRI) [2288]; Deutsche Forschungsgemeinschaft (DFG) [EXC 2121, 400140256 -GRK2497]; Hungarian 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, India; Latvian Council of Science [2022/WK/14]; National Science Center [Opus 2021/41/B/ST2/01369, 2021/43/B/ST2/01552]; Fundacao para a Ciencia e a Tecnologia [CEECIND/01334/2018]; National Priorities Research Program by Qatar National Research Fund; ERDF a way of making Europe [MDM-2017-0765]; Programa Severo Ochoa del Principado de Asturias (Spain); National Science, Research and Innovation Fund via the Program Management Unit for Human Resources & Institutional Development, Research and Innovation [B05F650021]; Kavli Foundation; Nvidia Corporation; SuperMicro Corporation; Welch Foundation [C-1845]; Weston Havens Foundation (USA)
dc.identifier.doi10.1007/JHEP07(2023)092
dc.identifier.issn1029-8479
dc.identifier.issue7
dc.identifier.scopus2-s2.0-85166214210
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.1007/JHEP07(2023)092
dc.identifier.urihttps://hdl.handle.net/11501/1076
dc.identifier.wosWOS:001061773800001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherSpringer
dc.relation.ispartofJournal of High Energy Physics
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectCP Violation
dc.subjectHadron-Hadron Scattering
dc.subjectHiggs Physics
dc.titleSearch for CP violation in t(t)over-bar H and tH production in multilepton channels in proton-proton collisions at √s=13 TeV
dc.typeArticle

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