Search For The Rare Decay of the W Boson İnto A Pion And A Photon İn Proton-Proton Collisions at ?s = 13 TeV

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dc.authorid291820en_US
dc.contributor.authorGüler, Emine Gürpınar
dc.contributor.author.;, ve diğer
dc.date.accessioned2021-09-06T13:09:47Z
dc.date.available2021-09-06T13:09:47Z
dc.date.issued2021
dc.departmentİstanbul Beykent Üniversitesien_US
dc.description.abstractA search is performed for the rare decay W-+/--> pi(+/-)gamma in proton-proton collisions at root s = 13 TeV. Data corresponding to an integrated luminosity of 137 fb(-1) were collected during 2016 to 2018 with the CMS detector. This analysis exploits a novel search strategy based on W boson production in top quark pair events. An inclusive search for the W-+/--> pi(+/-)gamma decay is not optimal at the LHC because of the high trigger thresholds. Instead, a trigger selection is exploited in which the W boson originating from one of the top quarks is used to tag the event in a leptonic decay. The W boson emerging from the other top quark is used to search for the W-+/--> pi(+/-)gamma signature. Such decays are characterized by an isolated track pointing to a large energy deposit, and by an isolated photon of large transverse momentum. The presence of b quark jets reduces the background from the hadronization of light-flavor quarks and gluons. The W-+/- -> pi(+/-)gamma decay is not observed. An upper exclusion limit is set to this branching fraction, corresponding to 1.50 x 10(-5) at 95% confidence level, whereas the expected upper exclusion limit is 0.85(-0.29)(+0.52) x 10(-5). (C) 2021 The Author(s). Published by Elsevier B.V.en_US
dc.identifier.citationPhysics Letters B Volume 819 Article Number 136409, 2021en_US
dc.identifier.doi10.1016/j.physletb.2021.136409
dc.identifier.issn2168-8184
dc.identifier.scopus2-s2.0-85111246735en_US
dc.identifier.scopusqualityN/Aen_US
dc.identifier.urihttps://doi.org/10.1016/j.physletb.2021.136409
dc.identifier.wosWOS:000679259200060en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier [Commercial Publisher]en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.subjectCMSen_US
dc.subjectStandard modelen_US
dc.subjectEWKen_US
dc.titleSearch For The Rare Decay of the W Boson İnto A Pion And A Photon İn Proton-Proton Collisions at ?s = 13 TeVen_US
dc.typeArticleen_US

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