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dc.contributorCMS Collaboration
dc.creatorSirunyan, A M
dc.creatorTumasyan, A
dc.creatorAdam, W
dc.creatorAmbrogi, F
dc.creatorAdžić, Petar
dc.creatorĆirković, Predrag
dc.creatorDevetak, Damir
dc.creatorĐorđević, Miloš
dc.creatorMilenović, Predrag
dc.creatorMilošević, Jovan
dc.date.accessioned2020-05-25T06:57:30Z
dc.date.available2020-05-25T06:57:30Z
dc.date.issued2019
dc.identifier.issn2470-0010
dc.identifier.urihttp://vinar.vin.bg.ac.rs/handle/123456789/8636
dc.description.abstractMeasurements of the top quark polarization and top quark pair (tt) spin correlations are presented using events containing two oppositely charged leptons (e+e-, e±μ or μ+μ-) produced in proton-proton collisions at a center-of-mass energy of 13 TeV. The data were recorded by the CMS experiment at the LHC in 2016 and correspond to an integrated luminosity of 35.9 fb-1. A set of parton-level normalized differential cross sections, sensitive to each of the independent coefficients of the spin-dependent parts of the tt production density matrix, is measured for the first time at 13 TeV. The measured distributions and extracted coefficients are compared with standard model predictions from simulations at next-to-leading-order (NLO) accuracy in quantum chromodynamics (QCD), and from NLO QCD calculations including electroweak corrections. All measurements are found to be consistent with the expectations of the standard model. The normalized differential cross sections are used in fits to constrain the anomalous chromomagnetic and chromoelectric dipole moments of the top quark to -0.24<CtG/Λ2<0.07 TeV-2 and -0.33<CtGI/Λ2<0.20 TeV-2, respectively, at the 95% confidence level. © 2019 CERN.en
dc.language.isoen
dc.rightsopenAccess
dc.sourcePhysical Review D
dc.titleMeasurement of the top quark polarization and t t spin correlations using dilepton final states in proton-proton collisions at s =13 TeVen
dc.typearticleen
dc.rights.licenseBY
dcterms.abstractСирунyан, A М; Тумасyан, A; Aдам, W; Aджић, Петар; Ћирковић, Предраг; Деветак, Дамир; Ђорђевић, Милош; Миленовић, Предраг; Милошевић, Јован; Aмброги, Ф;
dc.rights.holder© 2019 CERN
dc.citation.volume100
dc.citation.issue7
dc.identifier.wos000489251000002
dc.identifier.doi10.1103/PhysRevD.100.072002
dc.citation.rankM21
dc.contributor.countCMS Collaboration (ukupan broj autora: 2293)
dc.type.versionpublishedVersion
dc.identifier.scopus2-s2.0-85074338081
dc.identifier.fulltexthttp://vinar.vin.bg.ac.rs/bitstream/id/21316/PhysRevD.100.072002.pdf


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