Amplitude analysis of the B(s)0→K∗0K¯∗0 decays and measurement of the branching fraction of the B→ K∗ 0K¯ ∗ 0 decay
The B0→K∗0K¯¯¯¯¯∗0 and B0s→K∗0K¯¯¯¯¯∗0 decays are studied using proton-proton collision data corresponding to an integrated luminosity of 3 fb−1. An untagged and timeintegrated amplitude analysis of B 0(s) → (K+π−)(K−π+) decays in two-body invariant mass regions of 150 MeV/c2 around the K∗0 mass is...
| Autores: | , , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repositorio: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:2445/162300 |
| Acceso en línea: | https://hdl.handle.net/2445/162300 |
| Access Level: | acceso abierto |
| Palabra clave: | Hadrons Física de partícules Experiments Particle physics |
| Sumario: | The B0→K∗0K¯¯¯¯¯∗0 and B0s→K∗0K¯¯¯¯¯∗0 decays are studied using proton-proton collision data corresponding to an integrated luminosity of 3 fb−1. An untagged and timeintegrated amplitude analysis of B 0(s) → (K+π−)(K−π+) decays in two-body invariant mass regions of 150 MeV/c2 around the K∗0 mass is performed. A stronger longitudinal polarisation fraction in the B0→K∗0K¯¯¯¯¯∗0 decay, fL = 0.724 ± 0.051 (stat) ± 0.016 (syst), is observed as compared to fL = 0.240 ± 0.031 (stat) ± 0.025 (syst) in the B0s→K∗0K¯¯¯¯¯∗0 decay. The ratio of branching fractions of the two decays is measured and used to determine B(B0→K∗0K¯¯¯¯¯∗0)=(8.0±0.9(stat)±0.4(syst))×10−7. |
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