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Measurements of the branching fraction ratio $$ \mathcal{B}\left(\phi \to {\mu}^{+}{\mu}^{-}\right)/\mathcal{B}\left(\phi \to {\textrm{e}}^{+}{\textrm{e}}^{-}\right) $$ with charm meson decays

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115Institutions déclarées
22Pays d’affiliation déclarés

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A bstract Measurements of the branching fraction ratio $$ \mathcal{B}\left(\phi \to {\mu}^{+}{\mu}^{-}\right)/\mathcal{B}\left(\phi \to {e}^{+}{e}^{-}\right) $$ B ϕ → μ + μ − / B ϕ → e + e − with $$ {D}_s^{+}\to {\pi}^{+}\phi $$ D s + → π + ϕ and D + → π + ϕ decays, denoted $$ {R}_{\phi \pi}^s $$ R ϕπ s and $$ {R}_{\phi \pi}^d $$ R ϕπ d , are presented. The analysis is performed using a dataset corresponding to an integrated luminosity of 5 . 4 fb − 1 of pp collision data collected with the LHCb experiment. The branching fractions are normalised with respect to the B + → K + J/ψ (→ e + e − ) and B + → K + J/ψ (→ μ + μ − ) decay modes. The combination of the results yields $$ {R}_{\phi \pi}=1.022\pm 0.012\left(\textrm{stat}\right)\pm 0.048\left(\textrm{syst}\right). $$ R ϕπ = 1.022 ± 0.012 stat ± 0.048 syst . The result is compatible with previous measurements of the ϕ → ℓ + ℓ − branching fractions and predictions based on the Standard Model.

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DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.

Titre Crossref
Measurements of the branching fraction ratio $$ \mathcal{B}\left(\phi \to {\mu}^{+}{\mu}^{-}\right)/\mathcal{B}\left(\phi \to {\textrm{e}}^{+}{\textrm{e}}^{-}\right) $$ with charm meson decays
Date Crossref
24/05/2024
Éditeur
Springer Science and Business Media LLC
Type
journal-article

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Institutions déclarées

National Institute for Subatomic PhysicsUniversity of WarwickUniversity of ZurichUniversity of LiverpoolUniversidade de Santiago de CompostelaUniversity of BristolUppsala UniversityEuropean Organization for Nuclear ResearchUniversity of MichiganCentre National de la Recherche ScientifiqueUniversité Clermont AuvergneLaboratoire de Physique de Clermont AuvergneInstitut National de Physique Nucléaire et de Physique des ParticulesUniversity of CincinnatiIstituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiTU Dortmund UniversityUniversity of GlasgowUniversitat de BarcelonaUniversity of ManchesterUniversity 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 UniversityIstituto Nazionale di Fisica Nucleare, Sezione di FirenzeIstituto Nazionale di Fisica Nucleare, Sezione di FerraraSyracuse UniversityIstituto Nazionale di Fisica Nucleare, Sezione di GenovaIstituto Nazionale di Fisica Nucleare, Sezione di Milano BicoccaUniversity of Milano-BicoccaInstitute of High Energy PhysicsUniversity of Chinese Academy of SciencesUniversity of Rome Tor VergataIstituto Nazionale di Fisica Nucleare, Roma Tor VergataConsejo Nacional de RectoresAix-Marseille UniversitéCentre de physique des particules de MarseilleMassachusetts Institute of TechnologyÉcole PolytechniqueLaboratoire Leprince-RinguetUniversity of OxfordUniversité Savoie Mont BlancHeidelberg UniversityFZU ‒ Institute of Physics of the Academy of Sciences of the Czech RepublicÉcole Polytechnique Fédérale de LausanneCentro Brasileiro de Pesquisas FísicasUniversity of FlorencePontifícia Universidade Católica do Rio de JaneiroUniversity of EdinburghRWTH Aachen UniversityScuola Normale SuperioreIstituto Nazionale di Fisica Nucleare, Sezione di PisaState Key Laboratory of Nuclear Physics and TechnologyUniversitat Ramon LlullUniversity of PaduaInstitute of Nuclear Physics, Polish Academy of SciencesImperial College LondonMaastricht UniversityUniversity of FerraraUniversity of Maryland, College ParkIstituto Nazionale di Fisica Nucleare, Sezione di CagliariSouth China Normal UniversityWuhan UniversityIstituto Nazionale di Fisica Nucleare, Sezione di BolognaUniversity of BolognaUniversity of GenoaUniversity of MilanIstituto Nazionale di Fisica Nucleare, Sezione di MilanoInstitute for Nuclear ResearchUniversidade da CoruñaHoria Hulubei National Institute for R and D in Physics and Nuclear EngineeringIstituto Nazionale di Fisica Nucleare, Sezione di BariNational Autonomous University of HondurasLos Alamos National LaboratoryHunan UniversityUniversity of CagliariUniversity of GroningenFederal Center for Technological Education Celso Suckow da FonsecaUniversity of Bari Aldo MoroCentral China Normal UniversityEötvös Loránd UniversityMax Planck Institute for Nuclear PhysicsTsinghua UniversityUniversity College DublinCracow University of TechnologyIstituto Nazionale di Fisica Nucleare, Sezione di PerugiaRutherford Appleton LaboratoryUniversity of BonnAustralian Regenerative Medicine InstituteMonash UniversityUniversity of PerugiaJagiellonian UniversityAGH University of KrakowNational Centre for Nuclear ResearchUniversidade de BrasíliaUniversity College of Applied ScienceUniversitat de ValènciaUniversidad Nacional de ColombiaInstituto de Física CorpuscularUniversity of BirminghamKharkiv Institute of Physics and TechnologyUniversity of PisaLanzhou UniversityHenan UniversityIstituto Nazionale di Fisica Nucleare, Sezione di Roma IExcellence Cluster OriginsUniversity of BasilicataUniversity of SienaUniversidad de AlcaláUniversity of Urbino

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Sujets associés

Particle physics theoretical and experimental studiesHigh-Energy Particle Collisions ResearchSuperconducting Materials and Applications

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