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Accès ouvert déclaré 2018 article

Observation of the Z→ψℓ+ℓ− Decay in pp Collisions at s=13 TeV

10Citations signalées — pas une note de qualité
210Institutions déclarées
42Pays d’affiliation déclarés

Résumé fourni par la source

This Letter presents the observation of the rare $Z$ boson decay $Z\ensuremath{\rightarrow}\ensuremath{\psi}{\ensuremath{\ell}}^{+}{\ensuremath{\ell}}^{\ensuremath{-}}$. Here, $\ensuremath{\psi}$ represents contributions from direct $J/\ensuremath{\psi}$ and $\ensuremath{\psi}(2S)\ensuremath{\rightarrow}J/\ensuremath{\psi}X$, ${\ensuremath{\ell}}^{+}{\ensuremath{\ell}}^{\ensuremath{-}}$ is a pair of electrons or muons, and the $J/\ensuremath{\psi}$ meson is detected via its decay to ${\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$. The sample of proton-proton collision data, collected by the CMS experiment at the LHC at a center-of-mass energy of 13 TeV, corresponds to an integrated luminosity of $35.9\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$. The signal is observed with a significance in excess of 5 standard deviations. After subtraction of the $\ensuremath{\psi}(2S)\ensuremath{\rightarrow}J/\ensuremath{\psi}X$ contribution, the ratio of the branching fraction of the exclusive decay $Z\ensuremath{\rightarrow}J/\ensuremath{\psi}{\ensuremath{\ell}}^{+}{\ensuremath{\ell}}^{\ensuremath{-}}$ to the decay $Z\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$ within a fiducial phase space is measured to be $\mathcal{B}(Z\ensuremath{\rightarrow}J/\ensuremath{\psi}{\ensuremath{\ell}}^{+}{\ensuremath{\ell}}^{\ensuremath{-}})/\phantom{\rule{0ex}{0ex}}\mathcal{B}(Z\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}})=0.67\ifmmode\pm\else\textpm\fi{}0.18(\text{stat})\ifmmode\pm\else\textpm\fi{}0.05(\text{syst})$.

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Contrôle bibliographique ouvert

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

Titre Crossref
Observation of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>Z</mml:mi><mml:mo stretchy="false">→</mml:mo><mml:mi>ψ</mml:mi><mml:msup><mml:mrow><mml:mo>ℓ</mml:mo></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:msup><mml:mrow><mml:mo>ℓ</mml:mo></mml:mrow><mml:mrow><mml:mo>−</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math> Decay in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mi>p</mml:mi></mml:math> Collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msqrt><mml:mi>s</mml:mi></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:math>
Date Crossref
04/10/2018
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 Estadual Paulista (Unesp)Universidade 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 ResearchTexas Tech UniversityUniversity of California, DavisUniversity of VirginiaTsinghua UniversityUniversidad de Los AndesUniversity 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 DESYKarlsruhe Institute of TechnologyUniversität HamburgNational 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 DelhiNational Taiwan UniversityNorthwestern UniversityTata Institute of Fundamental ResearchIndian Institute of Technology MadrasBhabha Atomic Research CentreFermi National Accelerator LaboratoryInstitute for Research in Fundamental SciencesUniversity College DublinIstituto Nazionale di Fisica Nucleare, Sezione di BariUniversity of Bari Aldo MoroPolytechnic 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 PaviaIstituto Nazionale di Fisica Nucleare, Sezione di PisaUniversity of PisaScuola Normale SuperioreIstituto 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 SeoulBrown UniversitySungkyunkwan UniversityKorea UniversityChonnam National UniversitySejong UniversityHanyang UniversitySeoul National UniversityVilnius UniversityUniversity of MalayaInstituto Politécnico NacionalCentro de Investigación y de Estudios Avanzados del Instituto Politécnico NacionalIbero American UniversityBenemérita Universidad Autónoma de PueblaAutonomous University of San Luis PotosíUniversity 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 ResearchInstitute 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 UniversityKurchatov InstituteInstitute for High Energy PhysicsNational Research Tomsk State UniversityTomsk Polytechnic UniversityUniversity of BelgradeVinča Institute of Nuclear SciencesCentro de Investigaciones Energéticas, Medioambientales y TecnológicasUniversidad Autónoma de MadridUniversidad de OviedoUniversidad de CantabriaInstituto de Física de CantabriaPaul Scherrer InstituteETH ZurichUniversity of ZurichNational Central UniversityChulalongkorn UniversityCukurova UniversityMiddle East Technical UniversityBoğaziçi UniversityIstanbul Technical UniversityInstitute for Scintillation MaterialsKharkiv Institute of Physics and TechnologyUniversity of BristolImperial College LondonUniversity of Puerto Rico-MayaguezBrunel University of LondonBaylor UniversityUniversity of AmericaCatholic University of AmericaUniversity of AlabamaUniversity of California, Los AngelesUniversity of California, RiversideUniversity of California San DiegoFlorida State UniversityUniversity of California, Santa BarbaraUniversity of FloridaCalifornia Institute of TechnologyCarnegie Mellon UniversityUniversity of Colorado BoulderCornell UniversityMassachusetts Institute of TechnologyFlorida International UniversityFlorida Institute of TechnologyUniversity of Illinois ChicagoUniversity of IowaJohns Hopkins UniversityLawrence Livermore National LaboratoryUniversity of Maryland, College ParkUniversity of MinnesotaUniversity of MississippiUniversity of Nebraska–LincolnUniversity at Buffalo, State University of New YorkNortheastern UniversityUniversity of Notre DameRice UniversityThe Ohio State UniversityPrinceton UniversityPurdue University West LafayettePurdue University NorthwestUniversity of RochesterRutgers, The State University of New JerseyUniversity of Tennessee at KnoxvilleTexas A&M UniversityVanderbilt UniversityWayne State UniversityUniversity of Wisconsin–Madison

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Sujets associés

Particle physics theoretical and experimental studiesHigh-Energy Particle Collisions ResearchQuantum Chromodynamics and Particle Interactions

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