Analysis of B <inf>d,s</inf> mixing angles in the presence of new physics and an update of B <inf>s</inf>→K <sup>̄</sup>0 <sup>*</sup>K0 <sup>*</sup>

Sébastien Descotes-Genon, Joaquim Matias, Javier Virto

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48 Citations (Scopus)

Abstract

We discuss a simple approach to measure the weak mixing angles s and 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 d,sNP 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 B s→K0 *K ̄0 * is presented, which can be compared with a recent LHCb analysis. © 2012 American Physical Society.
Original languageEnglish
Article number034010
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume85
Issue number3
DOIs
Publication statusPublished - 7 Feb 2012

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