Observation of the baryonic B-decay ¯¯¯B0→Λ+c¯pK−π+
We report the observation of the baryonic B -decay ¯¯¯ B 0 → Λ + c ¯ p K − π + , excluding contributions from the decay ¯¯¯ B 0 → Λ + c ¯¯¯ Λ K − . Using a data sample of 467 × 10 6 B ¯¯¯ B pairs collected with the BABAR detector at the PEP-II storage ring at SLAC, the measured branching fraction is...
| Autores: | , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2009 |
| País: | España |
| Recursos: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/131623 |
| Acesso em linha: | https://hdl.handle.net/2445/131623 |
| Access Level: | acceso abierto |
| Palavra-chave: | Física de partícules Experiments Particle physics |
| Resumo: | We report the observation of the baryonic B -decay ¯¯¯ B 0 → Λ + c ¯ p K − π + , excluding contributions from the decay ¯¯¯ B 0 → Λ + c ¯¯¯ Λ K − . Using a data sample of 467 × 10 6 B ¯¯¯ B pairs collected with the BABAR detector at the PEP-II storage ring at SLAC, the measured branching fraction is ( 4.33 ± 0.82 stat ± 0.33 syst ± 1.13 Λ + c ) × 10 − 5 . In addition we find evidence for the resonant decay ¯¯¯ B 0 → Σ c ( 2455 ) ++ ¯ p K − and determine its branching fraction to be ( 1.11 ± 0.30 stat ± 0.09 syst ± 0.29 Λ + c ) × 10 − 5 . The errors are statistical, systematic, and due to the uncertainty in the Λ + c branching fraction. For the resonant decay ¯¯¯ B 0 → Λ + c ¯ p ¯¯¯¯ K * 0 we obtain an upper limit of 2.42 × 10 − 5 at 90% confidence level. |
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