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EnglishWe study the decay B0→D*+D*-KS0 using (230±2)×10^6BB̅ pairs collected by the BABAR detector at the PEP-II B factory. We measure a branching fraction B(B0→D*+D*-KS0)=(4.4±0.4±0.7)×10-3 and find evidence for the decay B0→D*-Ds1+(2536) with a significance of 4.6σ. A time-dependent CP asymmetry analysis is also performed to study the possible resonant contributions to B0→D*+D*-KS0 and the sign of cos2β. Our measurement indicates that there is a sizable resonant contribution to the decay B0→D*+D*-KS0 from an unknown Ds1+ state with large width, and that cos2β is positive at the 94% confidence level under certain theoretical assumptions.
| Titolo: | Measurement of the branching fraction and time-dependent CP asymmetry in the decay B0→D*+D*-Ks0 |
| Autori: | |
| Data di pubblicazione: | 2006 |
| Rivista: | |
| Abstract: | We study the decay B0→D*+D*-KS0 using (230±2)×10^6BB̅ pairs collected by the BABAR detector at the PEP-II B factory. We measure a branching fraction B(B0→D*+D*-KS0)=(4.4±0.4±0.7)×10-3 and find evidence for the decay B0→D*-Ds1+(2536) with a significance of 4.6σ. A time-dependent CP asymmetry analysis is also performed to study the possible resonant contributions to B0→D*+D*-KS0 and the sign of cos2β. Our measurement indicates that there is a sizable resonant contribution to the decay B0→D*+D*-KS0 from an unknown Ds1+ state with large width, and that cos2β is positive at the 94% confidence level under certain theoretical assumptions. |
| Handle: | http://hdl.handle.net/11577/1565521 |
| Appare nelle tipologie: | 01.01 - Articolo in rivista |
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