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Accès ouvert déclaré 2019 article

Measurement of the top quark polarization and tt¯ spin correlations using dilepton final states in proton-proton collisions at s=13 TeV

102Citations signalées — pas une note de qualité
215Institutions déclarées
45Pays d’affiliation déclarés

Résumé fourni par la source

Measurements of the top quark polarization and top quark pair ($t\overline{t}$) spin correlations are presented using events containing two oppositely charged leptons (${e}^{+}{e}^{\ensuremath{-}}$, ${e}^{\ifmmode\pm\else\textpm\fi{}}{\ensuremath{\mu}}^{\ensuremath{\mp}}$, or ${\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$) 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 $35.9\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$. A set of parton-level normalized differential cross sections, sensitive to each of the independent coefficients of the spin-dependent parts of the $t\overline{t}$ 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 $\ensuremath{-}0.24<{C}_{\mathrm{tG}}/{\mathrm{\ensuremath{\Lambda}}}^{2}<0.07\text{ }\text{ }{\mathrm{TeV}}^{\ensuremath{-}2}$ and $\ensuremath{-}0.33<{C}_{\mathrm{tG}}^{I}/{\mathrm{\ensuremath{\Lambda}}}^{2}<0.20\text{ }\text{ }{\mathrm{TeV}}^{\ensuremath{-}2}$, respectively, at the 95% confidence level.

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Contrôle bibliographique ouvert

DOI retrouvé dans Crossref DOI retrouvé, mais le titre doit être comparé manuellement.

Titre Crossref
Measurement of the top quark polarization and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>t</mml:mi><mml:mover accent="true"><mml:mrow><mml:mi>t</mml:mi></mml:mrow><mml:mrow><mml:mo stretchy="false">¯</mml:mo></mml:mrow></mml:mover></mml:mrow></mml:math> spin correlations using dilepton final states in proton-proton collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msqrt><mml:mrow><mml:mi>s</mml:mi></mml:mrow></mml:msqrt><mml:mo>=</mml:mo><mml:mn>13</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>TeV</mml:mi></mml:mrow></mml:math>
Date Crossref
08/10/2019
Éditeur
American Physical Society (APS)
Type
journal-article

Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude et ne compte pas comme une seconde source scientifique indépendante.

Institutions déclarées

A. Alikhanyan National LaboratoryInstitute of High Energy PhysicsUniversity of AntwerpVrije Universiteit BrusselUniversité Libre de BruxellesUniversity of KansasGhent University HospitalUCLouvainCentro Brasileiro de Pesquisas FísicasUniversidade do Estado do Rio de JaneiroUniversidade Federal do ABCBulgarian Academy of SciencesInstitute for Nuclear Research and Nuclear EnergySofia University "St. Kliment Ohridski"Beihang UniversityInstitute of High Energy PhysicsAbdus Salam Centre for PhysicsPeking UniversityEuropean Organization for Nuclear ResearchUniversity of VirginiaTsinghua UniversityUniversidad de Los AndesUniversidad de AntioquiaUniversity of SplitRuđer Bošković InstituteUniversity of CyprusCharles UniversityNational Polytechnic SchoolUniversidad San Francisco de QuitoAcademy of Scientific Research and TechnologyNational Institute of Chemical Physics and BiophysicsUniversity of HelsinkiHelsinki Institute of PhysicsLappeenranta-Lahti University of TechnologyCommissariat à l'Énergie Atomique et aux Énergies AlternativesUniversité Paris-SaclayCEA Paris-SaclayInstitut de Recherche sur les Lois Fondamentales de l'UniversCentre National de la Recherche ScientifiqueÉcole PolytechniqueInstitut National de Physique Nucléaire et de Physique des ParticulesLaboratoire Leprince-RinguetInstitut Pluridisciplinaire Hubert CurienUniversité de StrasbourgCentre de Calcul de l’Institut National de Physique Nucléaire et de Physique des ParticulesLyon 1 UniversitéInstitute of Nuclear Physics of LyonGeorgian Technical UniversityTbilisi State UniversityRWTH Aachen UniversitySaha Institute of Nuclear PhysicsDeutsches Elektronen-Synchrotron DESYUniversität HamburgKarlsruhe Institute of TechnologyNational Centre of Scientific Research "Demokritos"Institute of Nuclear and Particle PhysicsNational and Kapodistrian University of AthensNational Technical University of AthensUniversity of IoanninaEötvös Loránd UniversityHUN-REN Wigner Research Centre for PhysicsHUN-REN Institute for Nuclear ResearchUniversity of DebrecenIndian Institute of Science BangaloreNational Institute of Science Education and ResearchPanjab UniversityIndian Institute of Science Education and Research PuneUniversity of DelhiRice UniversityNorthwestern UniversityTata Institute of Fundamental ResearchIndian Institute of Technology MadrasBhabha Atomic Research CentreFermi National Accelerator LaboratoryUniversity of MinnesotaInstitute for Research in Fundamental SciencesUniversity College DublinIstituto Nazionale di Fisica Nucleare, Sezione di BariPolytechnic University of BariIstituto Nazionale di Fisica Nucleare, Sezione di BolognaUniversity of BolognaIstituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiUniversity of PerugiaIstituto Nazionale di Fisica Nucleare, Sezione di PerugiaUniversity of CataniaIstituto Nazionale di Fisica Nucleare, Sezione di CataniaIstituto Nazionale di Fisica Nucleare, Sezione di FirenzeUniversity of FlorenceIstituto Nazionale di Fisica Nucleare, Sezione di GenovaUniversity of GenoaIstituto Nazionale di Fisica Nucleare, Sezione di Milano BicoccaUniversity of Milano-BicoccaIstituto Nazionale di Fisica Nucleare, Sezione di NapoliUniversity of BasilicataUniversity of Naples Federico IIMarconi UniversityIstituto Nazionale di Fisica Nucleare, Sezione di PadovaUniversity of PaduaIstituto Nazionale di Fisica Nucleare, Sezione di PaviaUniversity of PaviaScuola Normale SuperioreIstituto Nazionale di Fisica Nucleare, Sezione di PisaUniversity of PisaIstituto Nazionale di Fisica Nucleare, Sezione di Roma ISapienza University of RomeIstituto Nazionale di Fisica Nucleare, Sezione di TorinoUniversity of TurinUniversità degli Studi del Piemonte Orientale “Amedeo Avogadro”University of TriesteIstituto Nazionale di Fisica Nucleare, Sezione di TriesteKyungpook National UniversityKansas State UniversityUniversity of FloridaUniversity of SeoulBrown UniversitySungkyunkwan UniversityTexas Tech UniversitySeoul National UniversityKorea UniversityChonnam National UniversitySejong UniversityHanyang UniversityRiga Technical UniversityVilnius UniversityUniversity of MalayaUniversidad de SonoraInstituto Politécnico NacionalCentro de Investigación y de Estudios Avanzados del Instituto Politécnico NacionalIbero American UniversityBenemérita Universidad Autónoma de PueblaAutonomous University of San Luis PotosíUniversity of MontenegroUniversity of AucklandUniversity of CanterburyNational Centre for Nuclear ResearchUniversity of WarsawLIP - Laboratory of Instrumentation and Experimental Particle PhysicsJoint Institute for Nuclear ResearchPetersburg Nuclear Physics InstituteInstitute for Nuclear ResearchKurchatov InstituteInstitute for Theoretical and Experimental PhysicsMoscow Institute of Physics and TechnologyNational Research Nuclear University MEPhIP.N. Lebedev Physical Institute of the Russian Academy of SciencesLomonosov Moscow State UniversityRutherford Appleton LaboratoryNovosibirsk State UniversityInstitute for High Energy PhysicsNational Research Tomsk State UniversityTomsk Polytechnic UniversityUniversity of BelgradeVienna Institute for Nature Conservation & AnalysesVinča Institute of Nuclear SciencesCentro de Investigaciones Energéticas, Medioambientales y TecnológicasUniversidad Autónoma de MadridUniversidad de OviedoUniversidad de CantabriaInstituto de Física de CantabriaUniversity of RuhunaPaul Scherrer InstituteETH ZurichUniversity of ZurichNational Central UniversityNational Taiwan UniversityUniversity of California San DiegoChulalongkorn UniversityCukurova UniversityMiddle East Technical UniversityBoğaziçi UniversityIstanbul Technical UniversityInstitute for Scintillation MaterialsKharkiv Institute of Physics and TechnologyUniversity of BristolUniversity of California, DavisImperial College LondonUniversity of Puerto Rico-MayaguezBrunel University of LondonBaylor UniversityUniversity of AmericaCatholic University of AmericaUniversity of AlabamaBoston UniversityUniversity of California, Los AngelesPrinceton UniversityUniversity of California, RiversideUniversity of Wisconsin–MadisonUniversity of California, Santa BarbaraCalifornia Institute of TechnologyCarnegie Mellon UniversityUniversity of Colorado BoulderCornell UniversityFlorida International UniversityMassachusetts Institute of TechnologyFlorida State UniversityFlorida Institute of TechnologyUniversity of Illinois ChicagoUniversity of IowaJohns Hopkins UniversityLawrence Livermore National LaboratoryUniversity of Maryland, College ParkUniversity of MississippiUniversity of Nebraska–LincolnUniversity at Buffalo, State University of New YorkNortheastern UniversityUniversity of Notre DameThe Ohio State UniversityPurdue University West LafayettePurdue University NorthwestUniversity of RochesterRutgers, The State University of New JerseyUniversity of Tennessee at KnoxvilleTexas A&M UniversityVanderbilt UniversityWayne State University

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Sujets associés

Particle physics theoretical and experimental studiesQuantum Chromodynamics and Particle InteractionsHigh-Energy Particle Collisions Research

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