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Observation of the Λb0→J/ψΛϕ decay in proton-proton collisions at s=13TeV

  • Sirunyan, AM
  • Tumasyan, A
  • Adam, W
  • Ambrogi, F
  • Bergauer, T
  • Dragicevic, M
  • Erö, J
  • Escalante Del Valle, A
  • Flechl, M
  • Frühwirth, R
  • Jeitler, M
  • Krammer, N
  • Krätschmer, I
  • Liko, D
  • Madlener, T
  • Mikulec, I
  • Rad, N
  • Schieck, J
  • Schöfbeck, R
  • Spanring, M
  • And 80 more
Publication Date
Mar 10, 2020
eScholarship - University of California
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© 2020 The Author The observation of the Λb0→J/ψΛϕ decay is reported using proton-proton collision data collected at s=13TeV by the CMS experiment at the LHC in 2018, corresponding to an integrated luminosity of 60fb−1. The ratio of the branching fractions B(Λb0→J/ψΛϕ)/B(Λb0→ψ(2S)Λ) is measured to be (8.26±0.90(stat)±0.68(syst)±0.11(B))×10−2, where the first uncertainty is statistical, the second is systematic, and the last uncertainty reflects the uncertainties in the world-average branching fractions of ϕ and ψ(2S) decays to the reconstructed final states.

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