Analysis of Bd,s mixing angles in the presence of new physics and an update of Bs -%26gt; (K)over-bar(0)*K-0*

作者：Descotes Genon Sebastien^*; Matias Joaquim; Virto Javier

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2012, 85(3): 034010.

DOI：10.1103/PhysRevD.85.034010

We discuss a simple approach to measure the weak mixing angles phi(s) and phi(d) of the B-s and B-d systems in the presence of New Physics. We present a new expression that allows one to measure directly phi(NP)(d,s) if New Physics contributes significantly to the mixing only. We apply the method to specific penguin-mediated B --%26gt; PP, B --%26gt; PV and B --%26gt; VV modes. We provide a very stringent and simple bound on the direct CP asymmetries of all these modes, the violation of which is a signal of New Physics in decay. Within the same theoretical framework, an updated prediction for the branching ratio of B-s --%26gt; K-0*(K) over bar (0)* is presented, which can be compared with a recent LHCb analysis.

• 出版日期2012-2-7