Evidence for the decays B0 → anti-D0 ϕ and B0 → anti-D*0 ϕ 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 B(B0 → anti-D0 ϕ) = (7.7 ± 2.1 ± 0.7 ± 0.7) × 10^−7, B(B0 → anti-D*0 ϕ) = (2.2 ± 0.5 ± 0.2 ± 0.2) × 10^−6. In these results, the first uncertainty is statistical, the second systematic, and the third is related to the branching fraction of the B0 → anti-D0 K+ K− decay, used for normalisation. By combining the branching fractions of the decays B0 → anti-D(*)0 ϕ and B0 → anti-D(*)0 ω, the ω-ϕ mixing angle δ is constrained to be tan^2 δ = (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 B0s → anti-D(*)0 ϕ decays, which can be used to determine the CKM angle γ, leads to B(B0s → anti-D0 ϕ) = (2.30 ± 0.10 ± 0.11 ± 0.20) × 10^−5, B(B0s → anti-D*0 ϕ) = (3.17 ± 0.16 ± 0.17 ± 0.27) × 10^−5.

Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., et al. (2023). Evidence for the Decays B0 → anti-D(*)0 ϕ and Updated Measurements of the Branching Fractions of the B0s → anti-D(*)0 ϕ Decays. JOURNAL OF HIGH ENERGY PHYSICS, 2023(10), 0-25 [10.1007/jhep10(2023)123].

Evidence for the Decays B0 → anti-D(*)0 ϕ and Updated Measurements of the Branching Fractions of the B0s → anti-D(*)0 ϕ Decays

Carbone, A.;Ferrari, F.;Galli, D.;Manuzzi, D.;Patrignani, C.;Spedicato, E.;Villa, A.;Zucchelli, S.;
2023

Abstract

Evidence for the decays B0 → anti-D0 ϕ and B0 → anti-D*0 ϕ 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 B(B0 → anti-D0 ϕ) = (7.7 ± 2.1 ± 0.7 ± 0.7) × 10^−7, B(B0 → anti-D*0 ϕ) = (2.2 ± 0.5 ± 0.2 ± 0.2) × 10^−6. In these results, the first uncertainty is statistical, the second systematic, and the third is related to the branching fraction of the B0 → anti-D0 K+ K− decay, used for normalisation. By combining the branching fractions of the decays B0 → anti-D(*)0 ϕ and B0 → anti-D(*)0 ω, the ω-ϕ mixing angle δ is constrained to be tan^2 δ = (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 B0s → anti-D(*)0 ϕ decays, which can be used to determine the CKM angle γ, leads to B(B0s → anti-D0 ϕ) = (2.30 ± 0.10 ± 0.11 ± 0.20) × 10^−5, B(B0s → anti-D*0 ϕ) = (3.17 ± 0.16 ± 0.17 ± 0.27) × 10^−5.
2023
Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., et al. (2023). Evidence for the Decays B0 → anti-D(*)0 ϕ and Updated Measurements of the Branching Fractions of the B0s → anti-D(*)0 ϕ Decays. JOURNAL OF HIGH ENERGY PHYSICS, 2023(10), 0-25 [10.1007/jhep10(2023)123].
Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Afsharnia, H.; Agapopoulou,...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/953642
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