The branching fraction of the decay B+→ψ(2S)φ(1020)K+, relative to the topologically similar decay B+→J/ψφ(1020)K+, is measured using proton-proton collision data collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV, corresponding to an integrated luminosity of 9 fb-1. The ratio is found to be 0.061±0.004±0.009, where the first uncertainty is statistical and the second systematic. Using the world-average branching fraction for B+→J/ψφ(1020)K+, the branching fraction for the decay B+→ψ(2S)φ(1020)K+ is found to be (3.0±0.2±0.5±0.2)×10-6, where the first uncertainty is statistical, the second systematic, and the third is due to the branching fraction of the normalization channel.
Branching fraction measurement of the decay B+→ψ(2S)ϕ(1020)K+
De Angelis, C.;Dettori, F.;Fabiano, F.;Manca, G.;Oldeman, R.;Provenzano, D.;Saitta, B.;
2025-01-01
Abstract
The branching fraction of the decay B+→ψ(2S)φ(1020)K+, relative to the topologically similar decay B+→J/ψφ(1020)K+, is measured using proton-proton collision data collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV, corresponding to an integrated luminosity of 9 fb-1. The ratio is found to be 0.061±0.004±0.009, where the first uncertainty is statistical and the second systematic. Using the world-average branching fraction for B+→J/ψφ(1020)K+, the branching fraction for the decay B+→ψ(2S)φ(1020)K+ is found to be (3.0±0.2±0.5±0.2)×10-6, where the first uncertainty is statistical, the second systematic, and the third is due to the branching fraction of the normalization channel.File | Dimensione | Formato | |
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PhysRevD.111.092008.pdf
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