Study of charmonium and charmonium-like contributions in B+→ J/ψηK+ decays
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.
- Publication:
-
Journal of High Energy Physics
- Pub Date:
- April 2022
- DOI:
- 10.1007/JHEP04(2022)046
- arXiv:
- arXiv:2202.04045
- Bibcode:
- 2022JHEP...04..046L
- Keywords:
-
- B Physics;
- Branching fraction;
- Hadron-Hadron Scattering;
- Quarkonium;
- High Energy Physics - Experiment
- E-Print:
- 29 pages, 7 figures. All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2021-047.html (LHCb public pages)