We study the decay B(0)-> D(*+)D(*-)K(S)(0) using (230 +/- 2)x10(6)B (B) over bar pairs collected by the BABAR detector at the PEP-II B factory. We measure a branching fraction B(B(0)-> D(*+)D(*-)K(S)(0))=(4.4 +/- 0.4 +/- 0.7)x10(-3) and find evidence for the decay B(0)-> D(*-)D(s1)(+)(2536) with a significance of 4.6 sigma. A time-dependent CP asymmetry analysis is also performed to study the possible resonant contributions to B(0)-> D(*+)D(*-)K(S)(0) and the sign of cos2 beta. Our measurement indicates that there is a sizable resonant contribution to the decay B(0)-> D(*+)D(*-)K(S)(0) from an unknown D(s1)(+) state with large width, and that cos2 beta is positive at the 94% confidence level under certain theoretical assumptions.

Measurement of the branching fraction and time-dependent CP asymmetry in the decay B(0)-> D(*+)D(*-)K(S)(0) RID C-2728-2008 RID C-5223-2009 RID C-5719-2008 RID D-1055-2009 RID A-2675-2009

ANGELINI, CARLO;BATIGNANI, GIOVANNI;BETTARINI, STEFANO;CALDERINI, GIOVANNI;FORTI, FRANCESCO;GIORGI, MARCELLO;PAOLONI, EUGENIO;RIZZO, GIULIANA;
2006-01-01

Abstract

We study the decay B(0)-> D(*+)D(*-)K(S)(0) using (230 +/- 2)x10(6)B (B) over bar pairs collected by the BABAR detector at the PEP-II B factory. We measure a branching fraction B(B(0)-> D(*+)D(*-)K(S)(0))=(4.4 +/- 0.4 +/- 0.7)x10(-3) and find evidence for the decay B(0)-> D(*-)D(s1)(+)(2536) with a significance of 4.6 sigma. A time-dependent CP asymmetry analysis is also performed to study the possible resonant contributions to B(0)-> D(*+)D(*-)K(S)(0) and the sign of cos2 beta. Our measurement indicates that there is a sizable resonant contribution to the decay B(0)-> D(*+)D(*-)K(S)(0) from an unknown D(s1)(+) state with large width, and that cos2 beta is positive at the 94% confidence level under certain theoretical assumptions.
2006
Aubert, B; Bona, M; Boutigny, D; Couderc, F; Karyotakis, Y; Lees, Jp; Poireau, V; Tisserand, V; Zghiche, A; Grauges, E; Palano, A; Chen, Jc; Qi, Nd; R...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/182951
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