Evidence for CP Violation in Time-Integrated D0→h−h+ Decay Rates
A search for time-integrated CP violation in D0→h−h+ (h=K, π) decays is presented using 0.62 fb−1 of data collected by LHCb in 2011. The flavor of the charm meson is determined by the charge of the slow pion in the D*+→D0π+ and D*−→¯¯¯D0π− decay chains. The difference in CP asymmetry between D0→K−K...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2012 |
| 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:20.500.14342/3304 |
| Acceso en línea: | http://hdl.handle.net/20.500.14342/3304 https://doi.org/10.1103/PhysRevLett.108.111602 |
| Access Level: | acceso abierto |
| Palabra clave: | Gran col·lisionador d'hadrons (França i Suïssa) Partícules (Física nuclear) Mesons 53 |
| Sumario: | A search for time-integrated CP violation in D0→h−h+ (h=K, π) decays is presented using 0.62 fb−1 of data collected by LHCb in 2011. The flavor of the charm meson is determined by the charge of the slow pion in the D*+→D0π+ and D*−→¯¯¯D0π− decay chains. The difference in CP asymmetry between D0→K−K+ and D0→π−π+, ΔACP≡ACP(K−K+)−ACP(π−π+), is measured to be [−0.82±0.21(stat)±0.11(syst)]%. This differs from the hypothesis of CP conservation by 3.5 standard deviations. |
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