Study of charmonium and charmonium-like contributions in B+ → J/ψηK+ decays

Author(s)
Aaij, R.; Abdelmotteleb, A. S. W.; Abellán Beteta, C.; Abudinén, F.; Ackernley, T.; ... Show more
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Abstract
Abstract A study of B+ → J/ψηK+ decays, followed by J/ψ → μ+μ− and η → γγ, 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/ψη mass spectrum is investigated for contributions from charmonia and charmonium-like states. Evidence is found for the B+ → (ψ2(3823) → J/ψη)K+ and B+ → (ψ(4040) → J/ψη)K+ decays with significance of 3.4 and 4.7 standard deviations, respectively. This constitutes the first evidence for the ψ2(3823) → J/ψη decay.
Date issued
2022-04-08
URI
https://hdl.handle.net/1721.1/141918
Department
Massachusetts Institute of Technology. Department of Physics
Publisher
Springer Berlin Heidelberg
Citation
Journal of High Energy Physics. 2022 Apr 08;2022(4):46
Version: Final published version
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