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Precision measurement of the W boson decay branching fractions in proton-proton collisions at s =13 TeV

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dc.contributor.authorTumasyan, A.
dc.contributor.authorAdam, W.
dc.contributor.authorAndrejkovic, J. W.
dc.contributor.authorBergauer, T.
dc.contributor.authorMatveev, V.
dc.contributor.authorChadeeva, M.
dc.contributor.authorOskin, A.
dc.contributor.authorParygin, P.
dc.contributor.authorPopova, E.
dc.contributor.authorRusinov, V.
dc.contributor.authorМатвеев, Виктор Анатольевич
dc.contributor.authorЧадеева, Марина Валентиновна
dc.contributor.authorРусинов, Владимир Юрьевич
dc.date.accessioned2024-12-25T15:25:23Z
dc.date.available2024-12-25T15:25:23Z
dc.date.issued2022
dc.description.abstract© 2022 CERN.The leptonic and inclusive hadronic decay branching fractions of the W boson are measured using proton-proton collision data collected at s=13 TeV by the CMS experiment at the CERN LHC, corresponding to an integrated luminosity of 35.9 fb-1. Events characterized by the production of one or two W bosons are selected and categorized based on the multiplicity and flavor of reconstructed leptons, the number of jets, and the number of jets identified as originating from the hadronization of b quarks. A binned maximum likelihood estimate of the W boson branching fractions is performed simultaneously in each event category. The measured branching fractions of the W boson decaying into electron, muon, and tau lepton final states are (10.83±0.10)%, (10.94±0.08)%, and (10.77±0.21)%, respectively, consistent with lepton flavor universality for the weak interaction. The average leptonic and inclusive hadronic decay branching fractions are estimated to be (10.89±0.08)% and (67.32±0.23)%, respectively. Based on the hadronic branching fraction, three standard model quantities are subsequently derived: the sum of squared elements in the first two rows of the Cabibbo-Kobayashi-Maskawa (CKM) matrix ∑ij|Vij|2=1.984±0.021, the CKM element |Vcs|=0.967±0.011, and the strong coupling constant at the W boson mass scale, αS(mW2)=0.095±0.033.
dc.identifier.citationPrecision measurement of the W boson decay branching fractions in proton-proton collisions at s =13 TeV / Tumasyan, A. [et al.] // Physical Review D. - 2022. - 105. - № 7. - 10.1103/PhysRevD.105.072008
dc.identifier.doi10.1103/PhysRevD.105.072008
dc.identifier.urihttps://www.doi.org/10.1103/PhysRevD.105.072008
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85130262791&origin=resultslist
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/28084
dc.relation.ispartofPhysical Review D
dc.titlePrecision measurement of the W boson decay branching fractions in proton-proton collisions at s =13 TeV
dc.typeArticle
dspace.entity.typePublication
oaire.citation.issue7
oaire.citation.volume105
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