A precise isospin analysis of B -> (D)over-bar(()*D-)(()*K-) decays

作者：Poireau Vincent^*; Zito Marco

来源：Physics Letters B, 2011, 704(5): 559-565.

DOI：10.1016/j.physletb.2011.09.097

We present a precise isospin analysis of the B -> (D) over bar (()*D-)(()*K-) decays using new recent experimental measurements on these final states. The decays B -> (D) over bar (()*D-)(()*K-), originating from b -> c (c) over bars transitions, are linked by a rich set of isospin properties. The isospin relations that connect the decay modes are presented and a fit is performed to obtain the isospin amplitudes and phases. We discuss the results of the fit and present a new measurement of the ratio of branching fractions B(gamma(45) -> B+B-) and 8(gamma(4S) -> B-0(B) over bar (0)). We finally discuss the implications of our findings for the measurement of the unitarity matrix parameters sin(2 beta) and cos(2 beta) using these decays.

• 出版日期2011-10-25
• 单位中国地震局