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. [The LHCb Collaboration]

Branching fraction measurement of the decay B+→ψ(2S)ϕ(1020)K+ / R. Aaij, A. . .A.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 111:9(2025 May 13), pp. 092008.1-092008.15. [10.1103/physrevd.111.092008]

Branching fraction measurement of the decay B+→ψ(2S)ϕ(1020)K+

S. Cesare;C. Mancuso;D. Marangotto;A. Merli;N. Neri;G. Tonani;
2025

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. [The LHCb Collaboration]
Settore PHYS-01/A - Fisica sperimentale delle interazioni fondamentali e applicazioni
13-mag-2025
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/1251858
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