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Improved Measurement of CP Violation Parameters in Bs0→J/ψK+K− Decays in the Vicinity of the ϕ(1020) Resonance

12Citations signalées — pas une note de qualité
90Institutions déclarées
19Pays d’affiliation déclarés

Résumé fourni par la source

The decay-time-dependent CP asymmetry in B_{s}^{0}→J/ψ(→μ^{+}μ^{-})K^{+}K^{-} decays is measured using proton-proton collision data, corresponding to an integrated luminosity of 6 fb^{-1}, collected with the LHCb detector at a center-of-mass energy of 13 TeV. Using a sample of approximately 349 000 B_{s}^{0} signal decays with an invariant K^{+}K^{-} mass in the vicinity of the ϕ(1020) resonance, the CP-violating phase ϕ_{s} is measured, along with the difference in decay widths of the light and heavy mass eigenstates of the B_{s}^{0}-B[over ¯]_{s}^{0} system, ΔΓ_{s}, and the difference of the average B_{s}^{0} and B^{0} meson decay widths, Γ_{s}-Γ_{d}. The values obtained are ϕ_{s}=-0.039±0.022±0.006 rad, ΔΓ_{s}=0.0845±0.0044±0.0024 ps^{-1}, and Γ_{s}-Γ_{d}=-0.0056_{-0.0015}^{+0.0013}±0.0014 ps^{-1}, where the first uncertainty is statistical and the second systematic. These are the most precise single measurements to date and are consistent with expectations based on the Standard Model and with the previous LHCb analyses of this decay. These results are combined with previous independent LHCb measurements. The phase ϕ_{s} is also measured independently for each polarization state of the K^{+}K^{-} system and shows no evidence for polarization dependence.

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Contrôle bibliographique ouvert

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

Titre Crossref
Improved Measurement of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>C</mml:mi><mml:mi>P</mml:mi></mml:math> Violation Parameters in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi>B</mml:mi><mml:mi>s</mml:mi><mml:mn>0</mml:mn></mml:msubsup><mml:mo stretchy="false">→</mml:mo><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi><mml:msup><mml:mi>K</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>K</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math> Decays in the Vicinity of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>ϕ</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>1020</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math> Resonance
Date Crossref
02/02/2024
Éditeur
American Physical Society (APS)
Type
journal-article

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Institutions déclarées

Centre National de la Recherche ScientifiqueAix-Marseille UniversitéNational Institute for Subatomic PhysicsCentre de physique des particules de MarseilleInstitut National de Physique Nucléaire et de Physique des ParticulesUniversity of WarwickUniversity of ZurichUniversity of LiverpoolUniversidade de Santiago de CompostelaUniversitat Ramon LlullUniversity of BristolIstituto Nazionale di Fisica Nucleare, Sezione di MilanoUppsala UniversityUniversity of GlasgowUniversité Clermont AuvergneEuropean Organization for Nuclear ResearchUniversity of MichiganSyracuse UniversityUniversity of CincinnatiIstituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiTU Dortmund UniversityUniversitat de BarcelonaUniversity of ManchesterUniversity of Chinese Academy of SciencesTsinghua UniversityUniversity of CambridgeDélégation Paris 7Université Paris CitéSorbonne UniversitéSorbonne Paris CitéLaboratoire de Physique Nucléaire et de Hautes ÉnergiesUniversidade Federal do Rio de JaneiroUniversité Paris-SaclayLaboratoire de Physique des 2 Infinis Irène Joliot-CuriePeking UniversityState Key Laboratory of Nuclear Physics and TechnologyIstituto Nazionale di Fisica Nucleare, Sezione di FirenzeIstituto Nazionale di Fisica Nucleare, Sezione di FerraraIstituto Nazionale di Fisica Nucleare, Roma Tor VergataMassachusetts Institute of TechnologyÉcole PolytechniqueLaboratoire Leprince-RinguetUniversity of OxfordLaboratoire d’Annecy de Physique des ParticulesUniversité Savoie Mont BlancSouth China Normal UniversityHeidelberg UniversityCollaborative Innovation Center of Quantum MatterÉcole Polytechnique Fédérale de LausanneCentro Brasileiro de Pesquisas FísicasPontifícia Universidade Católica do Rio de JaneiroUniversity of EdinburghRWTH Aachen UniversityIstituto Nazionale di Fisica Nucleare, Sezione di PisaInstitute of High Energy PhysicsHunan UniversityIstituto Nazionale di Fisica Nucleare, Sezione di GenovaIstituto Nazionale di Fisica Nucleare, Sezione di BolognaUniversity of PaduaUniversitat de ValènciaInstituto de Física CorpuscularInstitute of Nuclear Physics, Polish Academy of SciencesWuhan UniversityImperial College LondonUniversity College DublinEötvös Loránd UniversityRutherford Appleton LaboratoryLos Alamos National LaboratoryUniversity of BonnUniversity of GroningenCracow University of TechnologyKharkiv Institute of Physics and TechnologyMaastricht UniversityUniversidad Nacional de ColombiaCentral China Normal UniversityHoria Hulubei National Institute for R and D in Physics and Nuclear EngineeringNational Centre for Nuclear ResearchIstituto Nazionale di Fisica Nucleare, Sezione di BariIstituto Nazionale di Fisica Nucleare, Sezione di CagliariIstituto Nazionale di Fisica Nucleare, Sezione di Milano BicoccaInstitute for Nuclear ResearchMax Planck Institute for Nuclear PhysicsIstituto Nazionale di Fisica Nucleare, Sezione di Roma IIstituto Nazionale di Fisica Nucleare, Sezione di PerugiaConsejo Nacional de RectoresMonash UniversityUniversity of Maryland, College ParkAGH University of KrakowLanzhou UniversityUniversity of Birmingham

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

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