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Accès ouvert déclaré 2022 article

Observation of a Resonant Structure near the $D_{s}^{+}D_{s}^{-}$ Threshold in the $B^{+}→D_{s}^{+}D_{s}^{-}K^{+}$ Decay

2Citations signalées, ce qui n’est pas une note de qualité
86Institutions déclarées
18Pays d’affiliation déclarés

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Le résumé fourni par la source

An amplitude analysis of the B^{+}→D_{s}^{+}D_{s}^{-}K^{+} decay is carried out to study for the first time its intermediate resonant contributions, using proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV. A near-threshold peaking structure, referred to as X(3960), is observed in the D_{s}^{+}D_{s}^{-} invariant-mass spectrum with significance greater than 12 standard deviations. The mass, width, and the quantum numbers of the structure are measured to be 3956±5±10 MeV, 43±13±8 MeV, and J^{PC}=0^{++}, respectively, where the first uncertainties are statistical and the second systematic. The properties of the new structure are consistent with recent theoretical predictions for a state composed of cc[over ¯]ss[over ¯] quarks. Evidence for an additional structure is found around 4140 MeV in the D_{s}^{+}D_{s}^{-} invariant mass, which might be caused either by a new resonance with the 0^{++} assignment or by a J/ψϕ↔D_{s}^{+}D_{s}^{-} coupled-channel effect.

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Les institutions déclarées

National Institute for Subatomic PhysicsUniversity of WarwickUniversity of ZurichUniversity of LiverpoolUniversidade de Santiago de CompostelaUniversity of BristolCentre National de la Recherche ScientifiqueUniversité Clermont AuvergneInstitut National de Physique Nucléaire et de Physique des ParticulesDélégation Paris 7Université Paris CitéSorbonne UniversitéSorbonne Paris CitéLaboratoire de Physique Nucléaire et de Hautes ÉnergiesUniversity of MichiganSyracuse UniversityIstituto Nazionale di Fisica Nucleare, Sezione di MilanoUniversity of CincinnatiTU Dortmund UniversityEuropean Organization for Nuclear ResearchUniversity of GlasgowUniversitat de BarcelonaUniversity of ManchesterUniversity of CambridgeUniversidade Federal do Rio de JaneiroUniversité Paris-SaclayLaboratoire de Physique des 2 Infinis Irène Joliot-CurieIstituto Nazionale di Fisica Nucleare, Sezione di FirenzeIstituto Nazionale di Fisica Nucleare, Sezione di FerraraUniversity of Chinese Academy of SciencesHeidelberg UniversityAix-Marseille UniversitéCentre de physique des particules de MarseilleÉcole PolytechniqueLaboratoire Leprince-RinguetÉcole Polytechnique Fédérale de LausanneCentro Brasileiro de Pesquisas FísicasImperial College LondonRWTH Aachen UniversityIstituto Nazionale di Fisica Nucleare, Sezione di PisaInstitute of High Energy PhysicsIstituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiUniversitat Ramon LlullUniversity of PaduaInstitute of Nuclear Physics, Polish Academy of SciencesWuhan UniversityTsinghua UniversityUniversity of BirminghamMaastricht UniversityUniversity of Maryland, College ParkIstituto Nazionale di Fisica Nucleare, Sezione di CagliariSouth China Normal UniversityIstituto Nazionale di Fisica Nucleare, Sezione di Milano BicoccaIstituto Nazionale di Fisica Nucleare, Sezione di BolognaIstituto Nazionale di Fisica Nucleare, Roma Tor VergataIstituto Nazionale di Fisica Nucleare, Sezione di GenovaUniversity of OxfordUniversité Savoie Mont BlancInstitute for Nuclear ResearchUniversity of EdinburghHoria Hulubei National Institute for R and D in Physics and Nuclear EngineeringIstituto Nazionale di Fisica Nucleare, Sezione di BariMassachusetts Institute of TechnologyLos Alamos National LaboratoryHunan UniversityCentral China Normal UniversityPeking UniversityState Key Laboratory of Nuclear Physics and TechnologyUniversity of GroningenEötvös Loránd UniversityUniversity College DublinIstituto Nazionale di Fisica Nucleare, Sezione di PerugiaRutherford Appleton LaboratoryMonash UniversityUppsala UniversityAGH University of KrakowNational Centre for Nuclear ResearchPontifícia Universidade Católica do Rio de JaneiroUniversitat de ValènciaInstituto de Física CorpuscularKharkiv Institute of Physics and TechnologyLanzhou UniversityIstituto Nazionale di Fisica Nucleare, Sezione di Roma IUniversity of BonnUniversidad Nacional de ColombiaMax Planck Institute for Nuclear Physics

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Les sujets associés

Particle physics theoretical and experimental studiesQuantum Chromodynamics and Particle InteractionsNuclear physics research studies

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