The B + → Jψη′K + decay is observed for the first time using proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of 9 fb −1. The branching fraction of this decay is measured relative to the known branching fraction of the B + → ψ(2S)K + decay and found to be B(B+→Jψη′K+)B(B+→ψ(2S)K+)=(4.91±0.47±0.29±0.07)×10−2, where the first uncertainty is statistical, the second is systematic and the third is related to external branching fractions. A first look at the J/ψη′ mass distribution is performed and no signal of intermediate resonances is observed
(2023). Observation of the B+ → Jψη′K+ decay [journal article - articolo]. In JOURNAL OF HIGH ENERGY PHYSICS. Retrieved from https://hdl.handle.net/10446/264297
Observation of the B+ → Jψη′K+ decay
Lupato, A.;Redi, F.;
2023-01-01
Abstract
The B + → Jψη′K + decay is observed for the first time using proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of 9 fb −1. The branching fraction of this decay is measured relative to the known branching fraction of the B + → ψ(2S)K + decay and found to be B(B+→Jψη′K+)B(B+→ψ(2S)K+)=(4.91±0.47±0.29±0.07)×10−2, where the first uncertainty is statistical, the second is systematic and the third is related to external branching fractions. A first look at the J/ψη′ mass distribution is performed and no signal of intermediate resonances is observedFile | Dimensione del file | Formato | |
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