Measurement of cos 2β in B0→D(*)h0 Decays with a Time-Dependent Dalitz Plot Analysis of D→K0sπ+π−
We study the time-dependent Dalitz plot of D → K 0 S π + π − in B 0 → D ( * ) h 0 decays, where h 0 is a π 0 , η , η ′ , or ω meson and D ∗ → D π 0 , using a data sample of 383 × 10 6 Υ ( 4 S ) → B ¯¯¯ B decays collected with the BABAR detector. We determine cos 2 β = 0.42 ± 0.49 ± 0.09 ± 0.13 , s...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2007 |
| 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:2445/140149 |
| Acceso en línea: | https://hdl.handle.net/2445/140149 |
| Access Level: | acceso abierto |
| Palabra clave: | Física de partícules Experiments Particle physics |
| Sumario: | We study the time-dependent Dalitz plot of D → K 0 S π + π − in B 0 → D ( * ) h 0 decays, where h 0 is a π 0 , η , η ′ , or ω meson and D ∗ → D π 0 , using a data sample of 383 × 10 6 Υ ( 4 S ) → B ¯¯¯ B decays collected with the BABAR detector. We determine cos 2 β = 0.42 ± 0.49 ± 0.09 ± 0.13 , sin 2 β = 0.29 ± 0.34 ± 0.03 ± 0.05 , and | λ | = 1.01 ± 0.08 ± 0.02 , where the first error is statistical, the second is the experimental systematic uncertainty, and the third, where given, is the Dalitz model uncertainty. Assuming the world average value for sin 2 β and | λ | = 1 , cos 2 β > 0 is preferred over cos 2 β < 0 at 86% confidence level. |
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