Observation of the baryonic B decay ¯¯¯B0→Λ+c¯¯¯ΛK−
We report the observation of the baryonic B decay ¯¯¯ B 0 → Λ + c ¯¯¯ Λ K − with a significance larger than 7 standard deviations based on 471 × 10 6 B ¯¯¯ B pairs collected with the BABAR detector at the PEP-II storage ring at SLAC. We measure the branching fraction for the decay ¯¯¯ B 0 → Λ + c ¯¯...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2011 |
| 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:2445/131759 |
| Acceso en línea: | https://hdl.handle.net/2445/131759 |
| Access Level: | acceso abierto |
| Palabra clave: | Física de partícules Experiments Particle physics |
| Sumario: | We report the observation of the baryonic B decay ¯¯¯ B 0 → Λ + c ¯¯¯ Λ K − with a significance larger than 7 standard deviations based on 471 × 10 6 B ¯¯¯ B pairs collected with the BABAR detector at the PEP-II storage ring at SLAC. We measure the branching fraction for the decay ¯¯¯ B 0 → Λ + c ¯¯¯ Λ K − to be ( 3.8 ± 0.8 stat ± 0.2 sys ± 1.0 Λ + c ) × 10 − 5 . The uncertainties are statistical, systematic, and due to the uncertainty in the Λ + c branching fraction. We find that the Λ + c K − invariant-mass distribution shows an enhancement above 3.5 GeV / c 2 . |
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