Observation of Y(3940)→J/ψω in B→J/ψωK at BABAR
We present a study of the decays B 0 , + → J / ψ ω K 0 , + using 383 × 10 6 B ¯¯¯ B events obtained with the BABAR detector at PEP-II. We observe Y ( 3940 ) → J / ψ ω , with mass 3914.6 + 3.8 − 3.4 ( stat ) ± 2.0 ( syst ) MeV / c 2 , and width 34 + 12 − 8 ( stat ) ± 5 ( syst ) MeV . The rati...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2008 |
| 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:2445/138517 |
| Acceso en línea: | https://hdl.handle.net/2445/138517 |
| Access Level: | acceso abierto |
| Palabra clave: | Física de partícules Experiments Particle physics |
| Sumario: | We present a study of the decays B 0 , + → J / ψ ω K 0 , + using 383 × 10 6 B ¯¯¯ B events obtained with the BABAR detector at PEP-II. We observe Y ( 3940 ) → J / ψ ω , with mass 3914.6 + 3.8 − 3.4 ( stat ) ± 2.0 ( syst ) MeV / c 2 , and width 34 + 12 − 8 ( stat ) ± 5 ( syst ) MeV . The ratio of B 0 and B + decay to Y K is 0.27 + 0.28 − 0.23 ( stat ) + 0.04 − 0.01 ( syst ) , and the relevant B 0 and B + branching fractions are reported. |
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