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dc.contributor.authorSirunyan, A. M.
dc.contributor.authorSanders, Stephen J.
dc.contributor.authorCMS Collaboration
dc.identifier.citationA. M. Sirunyan et al., "Measurement of the top quark polarization and tt¯ spin correlations using dilepton final states in proton-proton collisions at √ s = 13 TeV", Phys. Rev. D 100, 072002, 8 October 2019, American Physical Society,
dc.descriptionThis work is licensed under a Creative Commons Attribution 4.0 International License.en_US
dc.description.abstractMeasurements of the top quark polarization and top quark pair (t¯t) spin correlations are presented using events containing two oppositely charged leptons (eþe−, eμ∓, or μþμ−) 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-leadingorder (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 < CI tG=Λ2 < 0.20 TeV−2, respectively, at the 95% confidence level.en_US
dc.publisherAmerican Physical Societyen_US
dc.rights© 2019 CERN, for the CMS Collaboration.en_US
dc.titleMeasurement of the top quark polarization and tt¯ spin correlations using dilepton final states in proton-proton collisions at √ s = 13 TeVen_US
kusw.kuauthorSanders, Stephen J.
kusw.kudepartmentPhysics and Astronomyen_US
kusw.oanotesPer Sherpa Romeo 01/26/2021:

Physical Review D [Open panel below]Publication Information TitlePhysical Review D [English] ISSNs Print: 2470-0010 Electronic: 2470-0029 URL PublishersAmerican Physical Society [Society Publisher] [Open panel below]Publisher Policy Open Access pathways permitted by this journal's policy are listed below by article version. Click on a pathway for a more detailed view.

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kusw.oaversionScholarly/refereed, publisher versionen_US
kusw.oapolicyThis item meets KU Open Access policy criteria.en_US

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© 2019 CERN, for the CMS Collaboration.
Except where otherwise noted, this item's license is described as: © 2019 CERN, for the CMS Collaboration.