Direct constraint on the Higgs-charm coupling from a search for Higgs boson decays into charm quarks with the ATLAS detector

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dc.authoridSerkant Ali Çetin / 0000-0001-5050-8441en_US
dc.authoridSertaç Öztürk / 0000-0001-6533-6144en_US
dc.authoridSinem Şimşek / 0000-0002-9650-3846en_US
dc.authoridAndrew John Beddall / 0000-0002-8451-9672
dc.authorscopusidSerkant Ali Çetin / 34567544400
dc.authorscopusidAndrew John Beddall / 57215802986
dc.authorscopusidSertaç Öztürk / 56421488400
dc.authorwosidAndrew John Beddal / DUQ-5730-2022en_US
dc.authorwosidSerkant Ali Çetin / AGF-0147-2022en_US
dc.authorwosidSertaç Öztürk / AGO-2476-2022en_US
dc.authorwosidSinem Şimşek / AGG-2640-2022en_US
dc.contributor.authorAad, G.
dc.contributor.authorBeddal, Andrew John
dc.contributor.authorÇetin, Serkant Ali
dc.contributor.authorÖztürk, Sertaç
dc.contributor.authorŞimşek, Sinem
dc.date.accessioned2022-09-12T12:35:18Z
dc.date.available2022-09-12T12:35:18Z
dc.date.issued2022en_US
dc.departmentİstinye Üniversitesien_US
dc.description.abstractA search for the Higgs boson decaying into a pair of charm quarks is presented. The analysis uses proton- proton collisions to target the production of a Higgs boson in association with a leptonically decaying W or Z boson. The dataset delivered by the LHC at a centre-of-mass energy of root s = 13 TeV and recorded by the ATLAS detector corresponds to an integrated luminosity of 139 fb(-1). Flavour-tagging algorithms are used to identify jets originating from the hadronisation of charm quarks. The analysis method is validated with the simultaneous measurement of WW, WZ and ZZ production, with observed (expected) significances of 2.6 (2.2) standard deviations above the background-only prediction for the (W/Z)Z(-> c (c) over bar) process and 3.8 (4.6) standard deviations for the (W/Z)W(-> cq) process. The (WIZ)H(-> c (c) over bar) search yields an observed (expected) upper limit of 26 (31) times the predicted Standard Model crosssection times branching fraction for a Higgs boson with a mass of 125 GeV, corresponding to an observed (expected) constraint on the charm Yukawa coupling modifier vertical bar k(c)vertical bar < 8.5 (12.4), at the 95% confidence level. A combination with the ATLAS (W/Z)H, H -> b<(b)over bar> analysis is performed, allowing the ratio k(c)/k(b) to be constrained to less than 4.5 at the 95% confidence level, smaller than the ratio of the b- and c-quark masses, and therefore determines the Higgs-charm coupling to be weaker than the Higgs-bottom coupling at the 95% confidence level.en_US
dc.identifier.citationAad, G., Beddal, A. J., Cetin, S. A., Ozturk, S., Simsek, S. (2022). Direct constraint on the Higgs-charm coupling from a search for Higgs boson decays into charm quarks with the ATLAS detector. European Physical Journal C, 82(8).en_US
dc.identifier.doi10.1140/epjc/s10052-022-10588-3en_US
dc.identifier.issn1434-6044en_US
dc.identifier.issue8en_US
dc.identifier.scopus2-s2.0-85136650931en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1140/epjc/s10052-022-10588-3
dc.identifier.urihttps://hdl.handle.net/20.500.12713/3134
dc.identifier.volume82en_US
dc.identifier.wosWOS:000842375600003en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorBeddall, Andrew John
dc.institutionauthorÇetin, Serkant Ali
dc.institutionauthorÖztürk, Sertaç
dc.institutionauthorŞimşek, Sinem
dc.language.isoenen_US
dc.publisherSPRINGERen_US
dc.relation.ispartofEUROPEAN PHYSICAL JOURNAL Cen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.titleDirect constraint on the Higgs-charm coupling from a search for Higgs boson decays into charm quarks with the ATLAS detectoren_US
dc.typeArticleen_US

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