Limit on the B0→ρ0ρ0 Branching Fraction and Implications for the Cabibbo-Kobayashi-Maskawa Angle α
We search for the decay B 0 → ρ 0 ρ 0 in a data sample of about 227 × 10 6 Υ ( 4 S ) → B ¯¯¯ B decays collected with the BABAR detector at the PEP-II asymmetric-energy e + e − collider at SLAC. We find no significant signal and set an upper limit of 1.1 × 10 − 6 at 90% C.L. on the branching fraction...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2005 |
| 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:2445/140640 |
| Acceso en línea: | https://hdl.handle.net/2445/140640 |
| Access Level: | acceso abierto |
| Palabra clave: | Física de partícules Experiments Particle physics |
| Sumario: | We search for the decay B 0 → ρ 0 ρ 0 in a data sample of about 227 × 10 6 Υ ( 4 S ) → B ¯¯¯ B decays collected with the BABAR detector at the PEP-II asymmetric-energy e + e − collider at SLAC. We find no significant signal and set an upper limit of 1.1 × 10 − 6 at 90% C.L. on the branching fraction. As a result, the uncertainty due to penguin contributions on the Cabibbo-Kobayashi-Maskawa unitarity angle α measured in B → ρ ρ decays is decreased to 11° at 68% C.L. |
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