Study of B0→D*−π+π−π+ and B0→D*−K+π−π+ decays
Using proton-proton collision data collected by the LHCb experiment at √s=7 TeV, corresponding to an integrated luminosity of 1.0 fb−1, the ratio of branching fractions of the B0→D*−π+π−π+ decay relative to the B0→D*−π+ decay is measured to be B(B0→D*−π+π−π+)B(B0→D*−π+)=2.64±0.04(stat)±0.13(syst)....
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2013 |
| 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:20.500.14342/3243 |
| Acceso en línea: | http://hdl.handle.net/20.500.14342/3243 https://doi.org/10.1103/PhysRevD.87.092001 |
| Access Level: | acceso abierto |
| Palabra clave: | Gran col·lisionador d'hadrons (França i Suïssa) Partícules (Física nuclear) Protons Col·lisions (Física nuclear) 539 |
| Sumario: | Using proton-proton collision data collected by the LHCb experiment at √s=7 TeV, corresponding to an integrated luminosity of 1.0 fb−1, the ratio of branching fractions of the B0→D*−π+π−π+ decay relative to the B0→D*−π+ decay is measured to be B(B0→D*−π+π−π+)B(B0→D*−π+)=2.64±0.04(stat)±0.13(syst). The Cabibbo-suppressed decay B0→D*−K+π−π+ is observed for the first time, and the measured ratio of branching fractions is B(B0→D*−K+π−π+)B(B0→D*−π+π−π+)=(6.47±0.37(stat)±0.35(syst))×10−2. A search for orbital excitations of charm mesons contributing to the B0→D*−π+π−π+ final state is also performed, and the first observation of the B0→¯¯¯D1(2420)0π+π− decay is reported with the ratio of branching fractions B(B0→(¯¯¯D1(2420)0→D*−π+)π−π+)B(B0→D*−π+π−π+)=(2.04±0.42(stat)±0.22(syst))×10−2, where the numerator represents a product of the branching fractions B(B0→¯¯¯D1(2420)0π−π+) and B(¯¯¯D1(2420)0→D*−π+). |
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