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We discuss a simple approach to measure the weak mixing angles phi_s andphi_d of the Bs and Bd systems in the presence of New Physics. We present a newexpression that allows one to measure directly the New Physics mixing angles ifNew Physics contributes significantly to the mixing only. We apply the methodto specific penguin-mediated B->PP, B->PV and B ->VV modes. We provide a verystringent and simple bound on the direct CP asymmetries of all these modes, theviolation of which is a signal of New Physics in decay. Within the sametheoretical framework, an updated prediction for the branching ratio of Bs->K0*anti-K0* is presented, which can be compared with a recent LHCb analysis.

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