Observation of gauge boson joint-polarisation states in W±Z production from pp collisions at s=13 TeV with the ATLAS detector

dc.authorid0000-0001-5050-8441en_US
dc.contributor.authorÇetin, Serkant Ali
dc.date.accessioned2024-05-17T07:10:50Z
dc.date.available2024-05-17T07:10:50Z
dc.date.issued2023-08
dc.departmentFakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Enerji Sistemleri Mühendisliği Bölümüen_US
dc.description.abstractMeasurements of joint-polarisation states of W and Z gauge bosons in W±Z production are presented. The data set used corresponds to an integrated luminosity of 139 fb?1 of proton–proton collisions at a centre-of-mass energy of 13 TeV recorded by the ATLAS detector at the CERN Large Hadron Collider. The W±Z candidate events are reconstructed using leptonic decay modes of the gauge bosons into electrons and muons. The simultaneous pair-production of longitudinally polarised vector bosons is measured for the first time with a significance of 7.1 standard deviations. The measured joint helicity fractions integrated over the fiducial region are f00=0.067±0.010, f0T=0.110±0.029, fT0=0.179±0.023 and fTT=0.644±0.032, in agreement with the next-to-leading-order Standard Model predictions. Individual helicity fractions of the W and Z bosons are also measured and found to be consistent with joint helicity fractions within the expected amounts of correlation. Both the joint and individual helicity fractions are also measured separately in W+Z and W?Z events. Inclusive and differential cross sections for several kinematic observables sensitive to polarisation are presented. © 2023en_US
dc.fullTextLevelFull Texten_US
dc.identifier.doi10.1016/j.physletb.2023.137895en_US
dc.identifier.issn0370-2693
dc.identifier.scopus2-s2.0-85165872790en_US
dc.identifier.urihttps://hdl.handle.net/11411/5346
dc.identifier.urihttps://doi.org/10.1016/j.physletb.2023.137895
dc.identifier.wosWOS:001057207200001en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.nationalInternationalen_US
dc.numberofauthors100+en_US
dc.publisherElsevier B.V.en_US
dc.relation.ispartofPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physicsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.titleObservation of gauge boson joint-polarisation states in W±Z production from pp collisions at s=13 TeV with the ATLAS detectoren_US
dc.typeArticleen_US
dc.volume843en_US

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