Measurement of CP violation in B0s → ϕϕ decays
A measurement of the decay time-dependent CP-violating asymmetry in B0s→ϕϕ decays is presented, along with measurements of the T-odd triple-product asymmetries. In this decay channel, the CP-violating weak phase arises from the interference between B0s−¯B0s mixing and the loop-induced decay amplitud...
| Autores: | , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2014 |
| 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:20.500.14342/3237 |
| Acceso en línea: | http://hdl.handle.net/20.500.14342/3237 https://doi.org/10.1103/PhysRevD.90.052011 |
| Access Level: | acceso abierto |
| Palabra clave: | Gran col·lisionador d'hadrons (França i Suïssa) Partícules (Física nuclear) Protons Col·lisions (Física nuclear) 539 |
| Sumario: | A measurement of the decay time-dependent CP-violating asymmetry in B0s→ϕϕ decays is presented, along with measurements of the T-odd triple-product asymmetries. In this decay channel, the CP-violating weak phase arises from the interference between B0s−¯B0s mixing and the loop-induced decay amplitude. Using a sample of proton-proton collision data corresponding to an integrated luminosity of 3.0 fb−1 collected with the LHCb detector, a signal yield of approximately 4000 B0s→ϕϕ decays is obtained. The CP-violating phase is measured to be ϕs=−0.17±0.15(stat)±0.03(syst) rad. The triple-product asymmetries are measured to be AU=−0.003±0.017(stat)±0.006(syst) and AV=−0.017±0.017(stat)±0.006(syst). Results are consistent with the hypothesis of CP conservation. |
|---|