Measurement of the τ lepton polarization in Z boson decays in proton-proton collisions at (Formula presented.)

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dc.authorid0000-0002-2614-5860en_US
dc.contributor.authorHayrapetyan, A.
dc.contributor.authorTumasyan, A.
dc.contributor.authorAdam, W.
dc.contributor.authorAndrejkovic, J.W.
dc.contributor.authorBergauer, T.
dc.contributor.authorChatterjee, S.
dc.contributor.authorSağır, Sinan
dc.contributor.authorCMS Collaboration
dc.date.accessioned2024-05-10T07:35:48Z
dc.date.available2024-05-10T07:35:48Z
dc.date.issued2024en_US
dc.departmentKMÜ, Sağlık Hizmetleri Meslek Yüksekokulu, Tıbbi Hizmetler ve Teknikler Bölümüen_US
dc.descriptionWOS:001190239900001en_US
dc.description.abstractThe polarization of τ leptons is measured using leptonic and hadronic τ lepton decays in Z → τ+ τ− events in proton-proton collisions at (Formula presented.) recorded by CMS at the CERN LHC with an integrated luminosity of 36.3 fb−1. The measured τ− lepton polarization at the Z boson mass pole is Pτ(Z) = −0.144 ± 0.006 (stat) ± 0.014 (syst) = −0.144 ± 0.015, in good agreement with the measurement of the τ lepton asymmetry parameter of Aτ = 0.1439 ± 0.0043 = − Pτ(Z) at LEP. The τ lepton polarization depends on the ratio of the vector to axial-vector couplings of the τ leptons in the neutral current expression, and thus on the effective weak mixing angle sin2 θWeff , independently of the Z boson production mechanism. The obtained value sin2 θWeff = 0.2319 ± 0.0008(stat) ± 0.0018(syst) = 0.2319 ± 0.0019 is in good agreement with measurements at e+ e− colliders. [Figure not available: see fulltext.].en_US
dc.identifier.citationThe CMS collaboration., Hayrapetyan, A., Tumasyan, A. et al.(2024). Measurement of the τ lepton polarization in Z boson decays in proton-proton collisions at (Formula presented.). Journal of High Energy Physics. 2024, 1.https://doi.org/10.1007/JHEP01(2024)101en_US
dc.identifier.doi10.1007/JHEP01(2024)101
dc.identifier.issn1029-8479
dc.identifier.issue1en_US
dc.identifier.scopus2-s2.0-85185595948
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1007/JHEP01(2024)101
dc.identifier.urihttps://hdl.handle.net/11492/8445
dc.identifier.volume2024en_US
dc.identifier.wosWOS:001190239900001
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Sceince
dc.indekslendigikaynakScopus
dc.institutionauthorSağır, Sinan
dc.language.isoen
dc.publisherSpringer Science and Business Media Deutschland GmbHen_US
dc.relation.journalJournal of High Energy Physicsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectHadron-Hadron Scatteringen_US
dc.subjectTau Physicsen_US
dc.titleMeasurement of the τ lepton polarization in Z boson decays in proton-proton collisions at (Formula presented.)en_US
dc.typeArticle

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