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arXiv · 1111.4882

An analysis of B_{d,s} mixing angles in presence of New Physics and an update of Bs -> K0* anti-K0*

Sebastien Descotes-Genon·Joaquim Matias·Javier Virto
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Abstract

We discuss a simple approach to measure the weak mixing angles phi_s and phi_d of the Bs and Bd systems in the presence of New Physics. We present a new expression that allows one to measure directly the New Physics mixing angles if New Physics contributes significantly to the mixing only. We apply the method to specific penguin-mediated B->PP, B->PV and B ->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 Bs->K0* anti-K0* is presented, which can be compared with a recent LHCb analysis.

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Sebastien Descotes-Genon, Joaquim Matias, Javier Virto. 2011-11-21. An analysis of B_{d,s} mixing angles in presence of New Physics and an update of Bs -> K0* anti-K0*. https://doi.org/10.1103/physrevd.85.034010

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