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Accès ouvert déclaré 2018 preprint

Evidence for an $η_c(1S) π^-$ resonance in $B^0 \to η_c(1S) K^+π^-$ decays

31Citations signalées, ce qui n’est pas une note de qualité
84Institutions déclarées
18Pays d’affiliation déclarés

Rattachement africain : nl, ch, es, gb, us, fr, it, de, ru, br, cn, cz, Zimbabwe, pl, ro, ua, ie, co. Niveau de preuve : code pays fourni par la source.

Le résumé fourni par la source

A Dalitz plot analysis of $B^0 \to η_c(1S) K^+π^-$ decays is performed using data samples of $pp$ collisions collected with the LHCb detector at centre-of-mass energies of $\sqrt{s}=7,~8$ and $13$ TeV, corresponding to a total integrated luminosity of $4.7~\text{fb}^{-1}$. A satisfactory description of the data is obtained when including a contribution representing an exotic $η_c(1S) π^-$ resonant state. The significance of this exotic resonance is more than three standard deviations, while its mass and width are $4096 \pm 20~^{+18}_{-22}$ MeV and $152 \pm 58~^{+60}_{-35}$ MeV, respectively. The spin-parity assignments $J^P=0^+$ and $J^{P}=1^-$ are both consistent with the data. In addition, the first measurement of the $B^0 \to η_c(1S) K^+π^-$ branching fraction is performed and gives $\displaystyle \mathcal{B}(B^0 \to η_c(1S) K^+π^-) = (5.73 \pm 0.24 \pm 0.13 \pm 0.66) \times 10^{-4}$, where the first uncertainty is statistical, the second systematic, and the third is due to limited knowledge of external branching fractions.

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Les institutions déclarées

National Institute for Subatomic PhysicsUniversity of ZurichUniversidade de Santiago de CompostelaUniversity of BristolBristol Robotics LaboratoryUniversity of MichiganUniversité Clermont AuvergneUniversity of CincinnatiIstituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiTU Dortmund UniversityEuropean Organization for Nuclear ResearchUniversity of GlasgowUniversitat de BarcelonaPetersburg Nuclear Physics InstituteImperial College LondonUniversidade Federal do Rio de JaneiroIstituto Nazionale di Fisica Nucleare, Sezione di PadovaUniversité Paris-SudCentre National de la Recherche ScientifiqueUniversité Paris-SaclayTsinghua UniversityIstituto Nazionale di Fisica Nucleare, Sezione di FirenzeFZU ‒ Institute of Physics of the Academy of Sciences of the Czech RepublicÉcole Polytechnique Fédérale de LausanneIstituto Nazionale di Fisica Nucleare, Sezione di FerraraUniversity of Maryland, College ParkUniversity of ManchesterHeidelberg UniversityAix-Marseille UniversitéCentre de physique des particules de MarseilleInstitute for High Energy PhysicsSyracuse UniversityYandex School of Data AnalysisIstituto Nazionale di Fisica Nucleare, Sezione di CagliariUniversity of WarwickNational University of Science and TechnologyIstituto Nazionale di Fisica Nucleare, Sezione di PisaCentro Brasileiro de Pesquisas FísicasUniversity of Chinese Academy of SciencesIstituto Nazionale di Fisica Nucleare, Sezione di Milano BicoccaDélégation Paris 7Université Paris CitéSorbonne UniversitéSorbonne Paris CitéLaboratoire de Physique Nucléaire et de Hautes ÉnergiesRWTH Aachen UniversityLomonosov Moscow State UniversityIstituto Nazionale di Fisica Nucleare, Sezione di BolognaUniversity of CambridgeInstitute of Nuclear Physics, Polish Academy of SciencesUniversity of BirminghamUniversity of OxfordIstituto Nazionale di Fisica Nucleare, Sezione di Roma IMassachusetts Institute of TechnologyBudker Institute of Nuclear PhysicsUniversity of LiverpoolWuhan UniversityIstituto Nazionale di Fisica Nucleare, Roma Tor VergataIstituto Nazionale di Fisica Nucleare, Sezione di GenovaUniversity of EdinburghInstitut National de Physique Nucléaire et de Physique des ParticulesUniversité Savoie Mont BlancUniversité Grenoble AlpesHoria Hulubei National Institute for R and D in Physics and Nuclear EngineeringLos Alamos National LaboratoryIstituto Nazionale di Fisica Nucleare, Sezione di BariMax Planck Institute for Nuclear PhysicsAGH University of KrakowCentral China Normal UniversityKharkiv Institute of Physics and TechnologyRutherford Appleton LaboratoryInstitute for Nuclear ResearchIstituto Nazionale di Fisica Nucleare, Sezione di MilanoUniversitat de ValènciaInstituto de Física CorpuscularUniversity of RostockPontifícia Universidade Católica do Rio de JaneiroKurchatov InstituteSouth China Normal UniversityUniversity College DublinUniversidad Nacional de ColombiaUniversity of GroningenNational Research Tomsk State UniversityTomsk Polytechnic University

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Les sujets associés

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

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