Measurement of CKM matrix elements in single top quark t-channel production in proton-proton collisions at root s=13 TeV

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dc.WoS.categoriesAstronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fieldsen_US
dc.authorid0000-0002-9007-8260en_US
dc.contributor.authorYetkin, Elif Aslı
dc.date.accessioned2020-11-06T06:46:06Z
dc.date.available2020-11-06T06:46:06Z
dc.date.issued2020-09-10
dc.departmentFakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Enerji Sistemleri Mühendisliği Bölümüen_US
dc.description31 pagesen_US
dc.description.abstractThe first direct, model-independent measurement is presented of the modulus of the Cabibbo-Kobayashi-Maskawa (CKM) matrix elements vertical bar V-tb vertical bar, vertical bar V-td vertical bar, and vertical bar V-ts vertical bar, in final states enriched in single top quark t-channel events. The analysis uses proton-proton collision data from the LHC, collected during 2016 by the CMS experiment, at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb(-1). Processes directly sensitive to these matrix elements are considered at both the production and decay vertices of the top quark. In the standard model hypothesis of CKM unitarity, a lower limit of vertical bar V-tb vertical bar > 0.970 is measured at the 95% confidence level. Several theories beyond the standard model are considered, and by releasing all constraints among the involved parameters, the values vertical bar V-tb vertical bar = 0.988 +/- 0.024, and vertical bar V-td vertical bar(2) + vertical bar V-ts vertical bar(2) = 0.06 +/- 0.06, where the uncertainties include both statistical and systematic components, are measured. (C) 2020 The Author.en_US
dc.fullTextLevelFull Texten_US
dc.identifier.doi10.1016/j.physletb.2020.135609en_US
dc.identifier.issn1873-2445
dc.identifier.issn0370-2693
dc.identifier.urihttps://hdl.handle.net/11411/2472
dc.identifier.urihttps://doi.org/10.1016/j.physletb.2020.135609
dc.identifier.wosWOS:000571769700003en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.language.isoenen_US
dc.nationalInternationalen_US
dc.numberofauthors1000+en_US
dc.publisherElsevieren_US
dc.relation.ispartofPhysics Letters Ben_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectTop quarken_US
dc.subjectCKM matrixen_US
dc.subjectPhysicsen_US
dc.subjectCMSen_US
dc.titleMeasurement of CKM matrix elements in single top quark t-channel production in proton-proton collisions at root s=13 TeVen_US
dc.typeArticleen_US
dc.volume808en_US

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