Measurement of indirect CP asymmetries in D0 → K−K+ and D0 → π −π + decays using semileptonic B decays
Time-dependent CP asymmetries in the decay rates of the singly Cabibbosuppressed decays D0 → K−K+ and D0 → π −π + are measured in pp collision data corresponding to an integrated luminosity of 3.0 fb−1 collected by the LHCb experiment. The D0 mesons are produced in semileptonic b-hadron decays, wher...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2015 |
| País: | España |
| Institución: | Universitat Ramon Llull (URL) |
| Repositorio: | DAU Arxiu Digital de la Universitat Ramon Llull |
| OAI Identifier: | oai:dau.url.edu:20.500.14342/3481 |
| Acceso en línea: | http://hdl.handle.net/20.500.14342/3481 https://doi.org/10.1007/JHEP04(2015)043 |
| Access Level: | acceso abierto |
| Palabra clave: | Gran col·lisionador d'hadrons (França i Suïssa) Interaccions d'hadrons 539 |
| Sumario: | Time-dependent CP asymmetries in the decay rates of the singly Cabibbosuppressed decays D0 → K−K+ and D0 → π −π + are measured in pp collision data corresponding to an integrated luminosity of 3.0 fb−1 collected by the LHCb experiment. The D0 mesons are produced in semileptonic b-hadron decays, where the charge of the accompanying muon is used to determine the initial state as D0 or D 0 . The asymmetries in effective lifetimes between D0 and D 0 decays, which are sensitive to indirect CP violation, are determined to be AΓ K−K+ = −0.134 ± 0.077 +0.026 −0.034 % , AΓ π −π + = −0.092 ± 0.145 +0.025 −0.033 % , where the first uncertainties are statistical and the second systematic. This result is in agreement with previous measurements and with the hypothesis of no indirect CP violation in D0 dec |
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