We study the decay B0→D*+D*-KS0 using (230±2) ×106BB̄ 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.

Aubert, B., Bona, M., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2006). Measurement of the branching fraction and time-dependent CP asymmetry in the decay B0→D*+D*-Ks0. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 74(9) [10.1103/PhysRevD.74.091101].

Measurement of the branching fraction and time-dependent CP asymmetry in the decay B0→D*+D*-Ks0

CARPINELLI, Massimo;
2006

Abstract

We study the decay B0→D*+D*-KS0 using (230±2) ×106BB̄ 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.
Articolo in rivista - Articolo scientifico
BABAR detector
English
2006
74
9
091101
none
Aubert, B., Bona, M., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2006). Measurement of the branching fraction and time-dependent CP asymmetry in the decay B0→D*+D*-Ks0. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 74(9) [10.1103/PhysRevD.74.091101].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/389794
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