Evidence for the decays B0 → D (∗)0ϕ and updated measurements of the branching fractions of the B0 s → D (∗)0ϕ decays
Evidence for the decays B0 → D 0 ϕ and B0 → D ∗0 ϕ is reported with a significance of 3.6 σ and 4.3 σ, respectively. The analysis employs pp collision data at centreof-mass energies √ s = 7, 8 and 13 TeV collected by the LHCb detector and corresponding to an integrated luminosity of 9 fb−1 . The bra...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2023 |
| País: | España |
| Institución: | Universitat Ramon Llull (URL) |
| Repositorio: | DAU Arxiu Digital de la Universitat Ramon Llull |
| OAI Identifier: | oai:dnet:dau_________::f0cfa430373452789b33de79b8a40bf4 |
| Acceso en línea: | https://hdl.handle.net/20.500.14342/6448 https://doi.org/10.1007/JHEP10(2023)123 |
| Access Level: | acceso abierto |
| Palabra clave: | B Physics Branching fraction Hadron-Hadron Scattering CKM Angle Gamma Decay Processes Nuclear Physics Gran col·lisionador d'hadrons 51 53 539 |
| Sumario: | Evidence for the decays B0 → D 0 ϕ and B0 → D ∗0 ϕ is reported with a significance of 3.6 σ and 4.3 σ, respectively. The analysis employs pp collision data at centreof-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(B 0 → D0ϕ) = (7.7 ± 2.1 ± 0.7 ± 0.7) × 10−7 , B(B 0 → D∗0ϕ) = (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 → D 0K+K− decay, used for normalisation. By combining the branching fractions of the decays B0 → D (∗)0ϕ and B0 → D (∗)0 ω, the ω-ϕ mixing angle δ is constrained to be tan2 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 B0 s → D (∗)0ϕ decays, which can be used to determine the CKM angle γ, leads to B(B 0 s → D0ϕ) = (2.30 ± 0.10 ± 0.11 ± 0.20) × 10−5 , B(B 0 s → D∗0ϕ) = (3.17 ± 0.16 ± 0.17 ± 0.27) × 10−5 . |
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