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Penguin-mediated B_(d,s)->VV decays and the Bs - anti-Bs mixing angle

In this letter, we propose three different strategies to extract the weak mixing angle phi_s of the Bs system using penguin-mediated decays into vectors, mainly Bs->K*K*, Bs->phi K* and Bs->phi phi. We also provide predictions for the longitudinal branching ratio and CP-asymmetries of Bs->K*K* using a method that combines QCD factorisation with flavour symmetries to relate this decay to its Bd counterpart.

preprint2007arXivOpen access
Sebastien Descotes-GenonJoaquim MatiasJavier Virto
hep-ph
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Open access3 authors1 topic
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Sebastien Descotes-GenonJoaquim MatiasJavier Virto

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