Evidence for the decays B0→D¯(*)0ϕ and updated measurements of the branching fractions of the Bs0→D¯(*)0ϕ decays

The LHCb collaboration

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Resum

Evidence for the decays B0→D¯0ϕ and B0→D¯*0ϕ is reported with a significance of 3.6 σ and 4.3 σ, respectively. The analysis employs pp collision data at centre-of-mass energies s = 7, 8 and 13 TeV collected by the LHCb detector and corresponding to an integrated luminosity of 9 fb−1. The branching fractions are measured to be (Formula presented.) In these results, the first uncertainty is statistical, the second systematic, and the third is related to the branching fraction of the B0→D¯0K+K decay, used for normalisation. By combining the branching fractions of the decays B0 → D¯∗0ϕ and B0 → D¯∗0ω, the ω-ϕ mixing angle δ is constrained to be tan2δ = (3.6 ± 0.7 ± 0.4) × 10−3, where the first uncertainty is statistical and the second systematic. An updated measurement of the branching fractions of the Bs0 → D¯∗0ϕ decays, which can be used to determine the CKM angle γ, leads to (Formula presented.) (Figure presented.).

Idioma originalAnglès
Número d’article123
RevistaJournal of High Energy Physics
Volum2023
Número10
DOIs
Estat de la publicacióPublicada - d’oct. 2023

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