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Observation of the Λb0→J/ψΞ-K+ and Ξb0→J/ψΞ-π+ decays

  • LHCb collaboration
  • European Organization for Nuclear Research
  • ENAC-IIC-GEL
  • INFN
  • University of Padova
  • Institute of High Energy Physics, Chinese Academy of Sciences
  • University of Chinese Academy of Sciences
  • University of Valencia
  • RWTH Aachen University
  • Central China Normal University
  • Tsinghua University
  • University of Warwick
  • State Key Laboratory of Nuclear Physics and Technology
  • University of Heidelberg
  • University of Oxford
  • Hunan University
  • INFN Sezione di Bologna
  • Institute for Nuclear Physics
  • Max-Planck-Institut für Kernphysik
  • University of Manchester
  • Université Paris-Saclay
  • Sezione di Genova
  • University of Genoa
  • Imperial College London
  • Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
  • Sezione INFN di Milano
  • South China Normal University
  • Wuhan University
  • Syracuse University
  • University of Cambridge
  • National Centre for Nuclear Research (NCBJ)
  • CCLRC Rutherford Appleton Laboratory
  • University of Bristol
  • University of Edinburgh
  • Massachusetts Institute of Technology
  • University of Cincinnati
  • University of Dortmund
  • University of Birmingham
  • University of Glasgow
  • Universidade da Coruña
  • Monash University
  • Maastricht University
  • Aix-Marseille Université
  • Sorbonne Université
  • University of Liverpool
  • Universitat Ramon LLull - CSIC
  • Universidade de Santiago de Compostela
  • University of Barcelona
  • Sezione INFN di Cagliari
  • Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
  • University of Urbino Carlo Bo
  • Sezione INFN di Ferrara
  • Physik-Institut der Universität Zürich
  • Science Park 105
  • Universidad de Alcalá
  • MST-8, Los Alamos National Laboratory
  • Vrije Universiteit Amsterdam
  • Agh University of Science and Technology Faculty of Computer Science
  • Centro Brasileiro de Pesquisas Fisicas
  • University of Milano
  • University of Ferrara
  • Laboratoire de Physique des Particules
  • Clermont-Auvergne University
  • University of Siena
  • The Ohio State University
  • Ruhr-University Bochum
  • Instituto de Biofisica da UFRJ
  • University Bonn
  • INFN Sezione di Bari
  • Università degli studi di Bari Aldo Moro
  • University of Michigan, Ann Arbor
  • LNF-INFN
  • INFN Roma Tor Vergata
  • Sezione di Roma
  • Università degli Studi della Basilicata
  • ICS/University of Groningen
  • INFN Sezione di Milano-Bicocca
  • University of Milano-Bicocca
  • Universitá di Cagliari
  • Eötvös Loránd University
  • Ip Paris
  • Consejo Nacional de Rectores (CONARE)
  • Uppsala University
  • Universidad Nacional de Colombia
  • Scuola Normale Superiore di Pisa
  • University of Freiburg
  • Dipartimento di Fisica
  • Pontifícia Universidade Católica do Rio de Janeiro
  • University of Pisa
  • Institute of Nuclear Research, National Academy of Sciences in Ukraine
  • Horia Hulubei National Institute of Physics and Nuclear Engineering
  • INFN Sezione di Perugia
  • University of Bologna
  • Universidad de Ingeniería y Tecnología (UTEC)
  • University of Maryland, College Park
  • University College Dublin
  • University of Perugia
  • Lanzhou University
  • Henan University
  • Tadeusz Kosciuszko Cracow University of Technology
  • Kharkov Institute of Physics and Technology
  • Lamarr Institute for Machine Learning and Artificial Intelligence
  • National University of Kyiv
  • Centro Federal De Educacão Tecnológica Celso Suckow Da Fonseca
  • Universidad Nacional Autónoma de Honduras
  • Facultad de Ciencias Fisicas
  • University of Rome “Tor Vergata”

Résultats de recherche: Contribution à un journalArticleRevue par des pairs

Résumé

The first observation of the Ξb0→J/ψΞ-π+ decay and the most precise measurement of the branching fraction of the Λb0→J/ψΞ-K+ decay are reported, using proton-proton collision data from the LHCb experiment collected in 2016–2018 at a centre-of-mass energy of 13\,TeV, corresponding to an integrated luminosity of 5.4\,fb-1. Using the Λb0→J/ψΛ and Ξb-→J/ψΞ- decays as normalisation channels, the ratios of branching fractions are measured to be (Formula presented.) where the first uncertainty is statistical and the second systematic.

langue originaleSuédois
Numéro d'article812
journalEuropean Physical Journal C
Volume85
Numéro de publication7
Les DOIs
étatPublié - 1 juil. 2025

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