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Title: Measurement of the branching ratio Γ(Λ0b → ψ(2S)Λ0)/Γ(Λ0b → J/ψΛ0) with the ATLAS detector

An observation of the Λ0b → ψ(2S)Λ0 decay and a comparison of its branching fraction with that of the Λ0b → J/ψΛ0 decay has been made with the ATLAS detector in proton-proton collisions at √s = 8 TeVat the LHC using an integrated luminosity of 20.6fb–1. The J/ψ and ψ(2S) mesons are reconstructed in their decays to a muon pair, while the Λ0 → pπ decay is exploited for the Λ0 baryon reconstruction. Furthermore, the Λ0b baryons are reconstructed with transverse momentum pT > 10 GeV and pseudorapidity |η| < 2.1.
  1. Aix-Marseille Univ. and CNRS/IN2P3, Marseille (France). et al.
Publication Date:
OSTI Identifier:
Grant/Contract Number:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 751; Journal Issue: C; Journal ID: ISSN 0370-2693
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Contributing Orgs:
ATLAS Collaboration
Country of Publication:
United States