Study of charmonium and charmonium-like contributions in B+ -> J/psi eta K+ decays

LHCb collaboration

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A study of B+ -> J/psi eta K+ decays, followed by J/psi -> mu(+)mu(-) and eta -> gamma gamma, is performed using a dataset collected with the LHCb detector in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV, corresponding to an integrated luminosity of 9 fb(-1). The J/psi eta mass spectrum is investigated for contributions from charmonia and charmonium-like states. Evidence is found for the B+ -> (psi(2)(3823) -> J/psi eta)K+ and B+ -> (psi(4040) -> J/psi eta)K+ decays with significance of 3.4 and 4.7 standard deviations, respectively. This constitutes the first evidence for the psi(2)(3823) -> J/psi eta decay.
Original languageEnglish
Article number046
Number of pages29
JournalJournal of High Energy Physics
Issue number4
Publication statusPublished - 8 Apr 2022


  • B Physics
  • Branching fraction
  • Hadron-Hadron Scattering
  • Quarkonium
  • X(3872)

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