B_s to K^(*)0 \bar K^(*)0 decays: the golden channels for new physics searches

M. Ciuchini; M. Pierini; L. Silvestrini

doi:10.1103/physrevlett.100.031802

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arXiv · hep-ph/0703137

B_s to K^()0 \bar K^()0 decays: the golden channels for new physics searches

M. Ciuchini·M. Pierini·L. Silvestrini

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Abstract

We point out that time-dependent CP asymmetries in B_s to K^{*0} \bar K^{*0} decays probe the presence of new physics in b to s transitions with an unprecedented theoretical accuracy. We show that, contrary to the case of B_d to phi K_S, it is possible to obtain a model-independent prediction for the coefficient S(B_s to K^{*0} \bar K^{*0}) in the Standard Model. We give an estimate of the experimental precision achievable with the next generation of B physics experiments. We also discuss how this approach can be extended to the case of B_s to \bar K^{*0} K^0, B_s to K^{*0} \bar K^0 and B_s to K^0 \bar K^0 decays and the different experimental challenges for these channels.

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M. Ciuchini, M. Pierini, L. Silvestrini. 2007-11-20. B_s to K^(*)0 \bar K^(*)0 decays: the golden channels for new physics searches. https://doi.org/10.1103/physrevlett.100.031802

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