Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/10453
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dc.contributor.authorCMS Collaboration-
dc.date.accessioned2021-01-24T18:43:13Z-
dc.date.available2021-01-24T18:43:13Z-
dc.date.issued2020-
dc.identifier.issn1029-8479-
dc.identifier.urihttps://hdl.handle.net/11147/10453-
dc.description.abstractThe combination of measurements of the W boson polarization in top quark decays performed by the ATLAS and CMS collaborations is presented. The measurements are based on proton-proton collision data produced at the LHC at a centre-of-mass energy of 8 TeV, and corresponding to an integrated luminosity of about 20 fb(-1)for each experiment. The measurements used events containing one lepton and having different jet multiplicities in the final state. The results are quoted as fractions of W bosons with longitudinal (F-0), left-handed (F-L), or right-handed (F-R) polarizations. The resulting combined measurements of the polarization fractions are F-0= 0.693 +/- 0.014 and F-L= 0.315 +/- 0.011. The fractionF(R)is calculated from the unitarity constraint to be F-R=-0.008 +/- 0.007. These results are in agreement with the standard model predictions at next-to-next-to-leading order in perturbative quantum chromodynamics and represent an improvement in precision of 25 (29)% for F-0(F-L) with respect to the most precise single measurement. A limit on anomalous right-handed vector (V-R), and left- and right-handed tensor (g(L), g(R)) tWb couplings is set while fixing all others to their standard model values. The allowed regions are [-0.11,0.16] for V-R, [-0.08,0.05] for g(L), and [-0.04,0.02] for g(R), at 95% confidence level. Limits on the corresponding Wilson coefficients are also derived.en_US
dc.language.isoenen_US
dc.publisherSpringer Verlagen_US
dc.relation.ispartofJournal of High Energy Physicsen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectHadron-Hadron scattering (experiments)en_US
dc.subjectTop physicsen_US
dc.titleCombination of the W boson polarization measurements in top quark decays using ATLAS and CMS data at root s=8 TeVen_US
dc.typeArticleen_US
dc.departmentİzmir Institute of Technology. Physicsen_US
dc.identifier.issue8en_US
dc.identifier.wosWOS:000562898300001en_US
dc.identifier.scopus2-s2.0-85090035581en_US
dc.identifier.doi10.1007/JHEP08(2020)051-
dc.relation.doi10.1007/JHEP08(2020)051en_US
dc.coverage.doi10.1007/JHEP08(2020)051en_US
dc.identifier.wosqualityQ1-
dc.identifier.scopusqualityQ2-
item.openairetypeArticle-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextNo Fulltext-
item.languageiso639-1en-
item.cerifentitytypePublications-
item.grantfulltextnone-
Appears in Collections:Rectorate / Rektörlük
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection
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