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

The LHCb collaboration

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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. [Figure not available: see fulltext.]

Idioma originalAnglès
Número d’article46
RevistaJournal of High Energy Physics
Estat de la publicacióPublicada - d’abr. 2022


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