Probing the CP nature of the top–Higgs Yukawa coupling in tt¯H and tH events with H?bb¯ decays using the ATLAS detector at the LHC

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dc.contributor.authorAad, G.
dc.contributor.authorAbbott, B.
dc.contributor.authorAbbott, D.C.
dc.contributor.authorAbed Abud, A.
dc.contributor.authorAbeling, K.
dc.contributor.authorAbhayasinghe, D.K.
dc.contributor.authorJiang, Y.
dc.date.accessioned2026-04-04T18:48:32Z
dc.date.available2026-04-04T18:48:32Z
dc.date.issued2024
dc.description.abstractThe CP properties of the coupling between the Higgs boson and the top quark are investigated using 139 fb?1 of proton–proton collision data recorded by the ATLAS experiment at the LHC at a centre-of-mass energy of s=13 TeV. The CP structure of the top quark–Higgs boson Yukawa coupling is probed in events with a Higgs boson decaying into a pair of b-quarks and produced in association with either a pair of top quarks, tt¯H, or a single top quark, tH. Events containing one or two electrons or muons are used for the measurement. Multivariate techniques are used to select regions enriched in tt¯H and tH events, where dedicated CP-sensitive observables are exploited. In an extension of the Standard Model (SM) with a CP-odd admixture in the top–Higgs Yukawa coupling, the mixing angle between CP-even and CP-odd couplings is measured to be ?=11?73 ?+52, compatible with the SM prediction corresponding to ?=0. © 2024 The Author(s)
dc.description.sponsorshipBSF-NSF; Agence Nationale de la Recherche, ANR; Australian Research Council, ARC; La Caixa Banking Foundation; Centre National pour la Recherche Scientifique et Technique, CNRST; Fundação para a Ciência e a Tecnologia, FCT; National Stroke Foundation, NSF; Narodowe Centrum Nauki, NCN; CEA-DRF; Horizon 2020, ICSC-NextGenerationEU; ; H2020 Marie Sk?odowska-Curie Actions, MSCA; INFN-CNAF; Nederlandse Organisatie voor Wetenschappelijk Onderzoek, NWO; Ministerio de Ciencia e Innovación, MICINN; Israel Science Foundation, ISF; Wallenberg Foundation; Leverhulme Trust; PROMETEO; Staatssekretariat für Bildung, Forschung und Innovation, SBFI; Javna Agencija za Raziskovalno Dejavnost RS, ARRS; Generalitat de Catalunya; Instituto Nazionale di Fisica Nucleare, INFN; Bundesministerium für Wissenschaft, Forschung und Wirtschaft, BMWFW; Austrian Science Fund, FWF; Narodowa Agencja Wymiany Akademickiej, NAWA; Alabama Space Grant Consortium, ASGC; GenT Programmes Generalitat Valenciana , Spain; Agencia Nacional de Investigación y Desarrollo, ANID; Bundesministerium für Bildung und Forschung, BMBF; Canada Foundation for Innovation, CFI; Helmholtz-Gemeinschaft, HGF; Danmarks Grundforskningsfond, DNRF; Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq; Karlsruhe Institute of Technology, KIT; GridKA; Göran Gustafssons Stiftelser; MIZŠ; Deutsche Forschungsgemeinschaft, DFG; Neurosurgical Research Foundation, NRF; Ministarstvo Prosvete, Nauke i Tehnološkog Razvoja, MPNTR; U.S. Department of Energy, USDOE; European Cooperation in Science and Technology, COST; EU-ESF; Horizon 2020 , ICSC-NextGenerationEU; RGC; Fundação de Amparo à Pesquisa do Estado de São Paulo, FAPESP; Institutul de Fizic? Atomic?, IFA; Ministry of Science and Technology of the People's Republic of China, MOST; Natural Sciences and Engineering Research Council of Canada, NSERC; Nella and Leon Benoziyo Center for Neurological Diseases, Weizmann Institute of Science; GenT Programmes Generalitat Valenciana, Spain; Irish Rugby Football Union, IRFU; Cantons of Bern and Geneva; Chinese Academy of Sciences, CAS; Defence Science Institute, DSI; Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, SNF; MNE; Agencia Nacional de Promoción Científica y Tecnológica, ANPCyT; Minerva Foundation; European Research Council, ERC; Royal Society of South Australia, RSSA; European Regional Development Fund, ERDF; CERN; Ministerstvo Školství, Mláde?e a T?lov?chovy, MŠMT; National Research Council Canada, NRC; Brookhaven National Laboratory, BNL; Alexander von Humboldt-Stiftung, AvH; Multiple Sclerosis Scientific Research Foundation, MSSRF; Ministry of Education, Culture, Sports, Science and Technology, MEXT; National Natural Science Foundation of China, NSFC; Norwegian Financial Mechanism, (2014-2021); NDGF, (CC-IN2P3); , (ST/T002816/1); ; UNCE, (SCI/013); Japan Society for the Promotion of Science, JSPS, (23K20854); Japan Society for the Promotion of Science, JSPS; DNSRC, (IN2P3-CNRS); British Columbia Knowledge Development Fund, BCKDF, (21/SCI/017); British Columbia Knowledge Development Fund, BCKDF
dc.identifier.doi10.1016/j.physletb.2024.138469
dc.identifier.issn0370-2693
dc.identifier.scopus2-s2.0-85185283920
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.physletb.2024.138469
dc.identifier.urihttps://hdl.handle.net/11411/10205
dc.identifier.volume849
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier B.V.
dc.relation.ispartofPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_Scopus_20260402
dc.subject[Keyword Not Available]
dc.titleProbing the CP nature of the top–Higgs Yukawa coupling in tt¯H and tH events with H?bb¯ decays using the ATLAS detector at the LHC
dc.typeArticle

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