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Accès ouvert déclaré 2023 article

Observation of the $$ {B}_s^0 $$ → D*+D*− decay

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100Institutions déclarées
18Pays d’affiliation déclarés

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Le résumé fourni par la source

Abstract The first observation of the $$ {B}_s^0 $$ B s 0 → D∗+D∗− decay and the measurement of its branching ratio relative to the B0→ D∗+D∗− decay are presented. The data sample used corresponds to an integrated luminosity of 9 fb−1 of proton-proton collisions recorded by the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV between 2011 and 2018. The decay is observed with more than 10 standard deviations and the time-integrated ratio of branching fractions is determined to be $$ \frac{\mathcal{B}\left({B}_s^0\to {D}^{\ast +}{D}^{\ast -}\right)}{\mathcal{B}\left({B}^0\to {D}^{\ast +}{D}^{\ast -}\right)}=0.269\pm 0.032\pm 0.011\pm 0.008, $$ B B s 0 → D ∗ + D ∗ − B B 0 → D ∗ + D ∗ − = 0.269 ± 0.032 ± 0.011 ± 0.008 , where the first uncertainty is statistical, the second systematic and the third due to the uncertainty of the fragmentation fraction ratio fs/fd. The $$ {B}_s^0 $$ B s 0 → D*+D*− branching fraction is calculated to be $$ \mathcal{B}\left({B}_s^0\to {D}^{\ast +}{D}^{\ast -}\right)=\left(2.15\pm 0.26\pm 0.09\pm 0.06\pm 0.16\right)\times {10}^{-4}, $$ B B s 0 → D ∗ + D ∗ − = 2.15 ± 0.26 ± 0.09 ± 0.06 ± 0.16 × 10 − 4 , where the fourth uncertainty is due to the B0→ D*+D*− branching fraction. These results are calculated using the average $$ {B}_s^0 $$ B s 0 meson lifetime in simulation. Correction factors are reported for scenarios where either a purely heavy or a purely light $$ {B}_s^0 $$ B s 0 eigenstate is considered.

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Le contrôle bibliographique ouvert

DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.

Titre Crossref
Observation of the $$ {B}_s^0 $$ → D*+D*− decay
Date Crossref
13/07/2023
Éditeur
Springer Science and Business Media LLC
Type
journal-article

Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.

Les institutions déclarées

National Institute for Subatomic PhysicsUniversity of WarwickUniversity of ZurichUniversity of LiverpoolUniversidade de Santiago de CompostelaUniversity of BristolUppsala UniversityCentre 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 MichiganIstituto 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-CurieTsinghua UniversityIstituto Nazionale di Fisica Nucleare, Sezione di FirenzeIstituto Nazionale di Fisica Nucleare, Sezione di FerraraSyracuse UniversityInstitute of High Energy PhysicsHeidelberg UniversityAix-Marseille UniversitéCentre de physique des particules de MarseilleÉcole PolytechniqueLaboratoire Leprince-RinguetÉcole Polytechnique Fédérale de LausanneCentro Brasileiro de Pesquisas FísicasImperial College LondonUniversity of Chinese Academy of SciencesRWTH Aachen UniversityIstituto Nazionale di Fisica Nucleare, Sezione di PisaPeking UniversityState Key Laboratory of Nuclear Physics and TechnologyIstituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiUniversitat Ramon LlullUniversity of PaduaInstitute of Nuclear Physics, Polish Academy of SciencesWuhan 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 UniversityUniversity of GroningenEötvös Loránd UniversityMax Planck Institute for Nuclear PhysicsUniversity College DublinCracow University of TechnologyIstituto Nazionale di Fisica Nucleare, Sezione di PerugiaRutherford Appleton LaboratoryMonash UniversityAGH University of KrakowNational Centre for Nuclear ResearchPontifícia Universidade Católica do Rio de JaneiroCentral China Normal UniversityUniversitat de ValènciaInstituto de Física CorpuscularKharkiv Institute of Physics and TechnologyCentral South UniversityIstituto Nazionale di Fisica Nucleare, Sezione di Roma IUniversity of BonnUniversidad Nacional de ColombiaUniversity of FerraraUniversity of Bari Aldo MoroUniversity of BolognaUniversity of GenoaScuola Normale SuperioreUniversity of PisaUniversity of CagliariUniversity of Rome Tor VergataUniversity of BasilicataUniversity of Milano-BicoccaUniversity of MilanUniversidad de AlcaláUniversity of Urbino

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Les sujets associés

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

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