CP Properties of Higgs Boson Interactions with Top Quarks in the (tt)over-barH and tH Processes Using H -> gamma gamma with the ATLAS Detector

Basit Öğe Kaydı
dc.WoS.categoriesPhysics, Multidisciplinaryen_US
dc.authorid0000-0001-5050-8441en_US
dc.contributor.authorÇetin, Serkant Ali
dc.date.accessioned2020-11-10T09:43:50Z
dc.date.available2020-11-10T09:43:50Z
dc.date.issued2020-08-05
dc.departmentFakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Enerji Sistemleri Mühendisliği Bölümüen_US
dc.description21 pagesen_US
dc.description.abstractA study of the charge conjugation and parity (CP) properties of the interaction between the Higgs boson and top quarks is presented. Higgs bosons are identified via the diphoton decay channel (H -> gamma gamma), and their production in association with a top quark pair ((tt) over barH) or single top quark (tH) is studied. The analysis uses 139 fb(-1) of proton-proton collision data recorded at a center-of-mass energy off root s= 13 TeV with the ATLAS detector at the Large Hadron Collider. Assuming a CP-even coupling, the (tt) over barH process is observed with a significance of 5.2 standard deviations. The measured cross section times H -> gamma gamma branching ratio is 1.64(-0.36)(+0.38)(stat)(-0.14)(+0.17) (sys) fb, and the measured rate for (tt) over barH is 1.43(-0.31)(+0.33) (stat)(-0.15)(+0.21) (sys) times the Standard Model expectation. The tH production process is not observed and an upper limit on its rate of 12 times the Standard Model expectation is set. A CP-mixing angle greater (less) than 43 (-43)degrees is excluded at 95% confidence level.en_US
dc.fullTextLevelFull Texten_US
dc.identifier.doi10.1103/PhysRevLett.125.061802en_US
dc.identifier.issn1079-7114
dc.identifier.issn0031-9007
dc.identifier.pmid32845699en_US
dc.identifier.scopus2-s2.0-85089979046en_US
dc.identifier.urihttps://hdl.handle.net/11411/2557
dc.identifier.urihttps://doi.org/10.1103/PhysRevLett.125.061802
dc.identifier.wosWOS:000555785600003en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.issue6en_US
dc.language.isoenen_US
dc.nationalInternationalen_US
dc.numberofauthors1000+en_US
dc.publisherAmer Physical Soc.en_US
dc.relation.ispartofPhysical Review Lettersen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectDecaysen_US
dc.subjectProgramen_US
dc.subjectSearchen_US
dc.subjectQcd correctionsen_US
dc.subjectLHCen_US
dc.titleCP Properties of Higgs Boson Interactions with Top Quarks in the (tt)over-barH and tH Processes Using H -> gamma gamma with the ATLAS Detectoren_US
dc.typeArticleen_US
dc.volume125en_US

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