Aller au contenu principal
Accès ouvert déclaré 2026 article

Measurement of the branching fraction of the $$ {\Lambda}_b^0\to J/\psi \Lambda $$ decay and isospin asymmetry of B → J/ψK decays

1Citations signalées — pas une note de qualité
128Institutions déclarées
25Pays d’affiliation déclarés

Résumé fourni par la source

A bstract This paper describes a measurement of the $$ {\Lambda}_b^0\to J/\psi \Lambda $$ Λ b 0 → J / ψ Λ branching fraction using data collected with the LHCb experiment in proton-proton collisions from 2016 to 2018. The dataset corresponds to an integrated luminosity of 5 . 4 fb − 1 . The branching fraction is determined relative to that of $$ {B}^0\to J/\psi {K}_{\textrm{S}}^0 $$ B 0 → J / ψ K S 0 decays, $$ \frac{\mathcal{B}\left({\Lambda}_b^0\to J/\psi \Lambda \right)}{\mathcal{B}\left({B}^0\to J/\psi {K}_{\textrm{S}}^0\right)}=0.750\pm 0.005\pm 0.022\pm 0.005\pm 0.062, $$ B Λ b 0 → J / ψ Λ B B 0 → J / ψ K S 0 = 0.750 ± 0.005 ± 0.022 ± 0.005 ± 0.062 , yielding $$ \mathcal{B}\left({\Lambda}_b^0\to J/\psi \Lambda \right)=\left(3.34\pm 0.02\pm 0.10\pm 0.08\pm 0.28\right)\times {10}^{-4} $$ B Λ b 0 → J / ψ Λ = 3.34 ± 0.02 ± 0.10 ± 0.08 ± 0.28 × 10 − 4 , where the first uncertainty is statistical, the second systematic, the third due to external inputs on branching fractions and the fourth due to the ratio of $$ {\Lambda}_b^0 $$ Λ b 0 baryon and B 0 meson hadronisation fractions. In addition, the isospin asymmetry between the rates of $$ {B}^0\to J/\psi {K}_{\textrm{S}}^0 $$ B 0 → J / ψ K S 0 and B + → J/ψK + decays is measured to be $$ {A}_{\

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.

Contrôle bibliographique ouvert

DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.

Titre Crossref
Measurement of the branching fraction of the $$ {\Lambda}_b^0\to J/\psi \Lambda $$ decay and isospin asymmetry of B → J/ψK decays
Date Crossref
26/01/2026
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 ne compte pas comme une seconde source scientifique indépendante.

Institutions déclarées

National Institute for Subatomic PhysicsUniversity of WarwickUniversity of ZurichUniversity of LiverpoolSyracuse UniversityUniversidade de Santiago de CompostelaUniversity of BristolUppsala UniversityCentre National de la Recherche ScientifiqueUniversité Paris-SaclayInstitut National de Physique Nucléaire et de Physique des ParticulesLaboratoire de Physique des 2 Infinis Irène Joliot-CurieUniversity of MichiganUniversité Clermont AuvergneLaboratoire de Physique de Clermont AuvergneJagiellonian UniversityAGH University of KrakowIstituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiTU Dortmund UniversityMachine Intelligence Research InstituteLamarr Institute for Machine Learning and Artificial IntelligenceVilnius UniversityEuropean Organization for Nuclear ResearchUniversity of CambridgeDélégation Paris 7Université Paris CitéSorbonne UniversitéSorbonne Paris CitéLaboratoire de Physique Nucléaire et de Hautes ÉnergiesUniversidade Federal do Rio de JaneiroPeking UniversityIstituto Nazionale di Fisica Nucleare, Sezione di FirenzeIstituto Nazionale di Fisica Nucleare, Sezione di FerraraUniversidade da CoruñaIstituto Nazionale di Fisica Nucleare, Sezione di Milano BicoccaUniversity of Milano-BicoccaUniversity of Chinese Academy of SciencesCommissariat à l'Énergie Atomique et aux Énergies AlternativesCEA Paris-Saclay - Etablissement de SaclayCEA Paris-SaclayInstitut de Recherche sur les Lois Fondamentales de l'UniversUniversity of Rome Tor VergataIstituto Nazionale di Fisica Nucleare, Roma Tor VergataConsejo Nacional de RectoresAix-Marseille UniversitéCentre de physique des particules de MarseilleFZU ‒ Institute of Physics of the Academy of Sciences of the Czech RepublicÉcole Polytechnique Fédérale de LausanneMassachusetts Institute of TechnologyÉcole PolytechniqueLaboratoire Leprince-RinguetUniversity of OxfordHeidelberg UniversityRuhr University BochumCentro Brasileiro de Pesquisas FísicasPontifícia Universidade Católica do Rio de JaneiroUniversity of ManchesterIstituto Nazionale di Fisica Nucleare, Sezione di BolognaUniversity of EdinburghIstituto Nazionale di Fisica Nucleare, Sezione di PisaIstituto Nazionale di Fisica Nucleare, Sezione di GenovaIstituto Nazionale di Fisica Nucleare, Sezione di Roma IUniversitat Ramon LlullIstituto Nazionale di Fisica Nucleare, Sezione di PadovaTaras Shevchenko National University of KyivInstitute of Nuclear Physics, Polish Academy of SciencesUniversity of BonnImperial College LondonLaboratoire d’Annecy de Physique des ParticulesUniversité Savoie Mont BlancUniversity of Modena and Reggio EmiliaUniversity of VictoriaLos Alamos National LaboratoryMaastricht UniversityUniversity of FerraraAustralian Regenerative Medicine InstituteMonash UniversityCracow University of TechnologyThe Ohio State UniversityIstituto Nazionale di Fisica Nucleare, Sezione di CagliariWuhan UniversityUniversitat de BarcelonaUniversidade Estadual de Campinas (UNICAMP)University of BolognaUniversity of GenoaScuola Normale SuperioreUniversity of MilanIstituto Nazionale di Fisica Nucleare, Sezione di MilanoTsinghua UniversityEötvös Loránd UniversityHoria Hulubei National Institute for R and D in Physics and Nuclear EngineeringIstituto Nazionale di Fisica Nucleare, Sezione di BariUniversity of GlasgowUniversity of CincinnatiNational Autonomous University of HondurasHunan UniversityUniversity of CagliariUniversity of GroningenFederal Center for Technological Education Celso Suckow da FonsecaUniversity of Bari Aldo MoroCentral China Normal UniversityUniversity College DublinSouth China Normal UniversityIstituto Nazionale di Fisica Nucleare, Sezione di PerugiaRutherford Appleton LaboratoryUniversity of PerugiaUniversitat de ValènciaInstituto de Física CorpuscularUniversity of Maryland, College ParkKharkiv Institute of Physics and TechnologyUniversity of FreiburgLIP6University of PisaUniversity College of Applied ScienceRWTH Aachen UniversityUniversidad Nacional de ColombiaUniversity of BirminghamHenan Normal UniversityLanzhou UniversityUniversity of PaduaUniversity of BergamoUniversidad de Ingeniería y TecnologíaUniversity of SienaUniversity of BasilicataMax Planck Institute for Nuclear PhysicsUniversidad de AlcaláUniversity of UrbinoUniversidad Andrés Bello

Une affiliation ne permet pas de déduire la nationalité d’un auteur.

Sujets associés

Particle physics theoretical and experimental studiesQuantum Chromodynamics and Particle InteractionsMedical Imaging Techniques and Applications

BNTIC News n’est pas le producteur de ces données. Recherche à la demande dans Crossref et Europe PMC, sans clé ; OpenAlex reste optionnel. Aucun service payant requis, aucune réponse conservée. Sources et limites.