News on $B\to K^{(\ast )}\nu \bar{\nu }$ in the Standard Model and beyond

Abstract

An analysis of the rare B decays $B\to K^{(\ast )}\nu \bar{\nu }$ is presented both within the SM and beyond. The SM predictions for the branching ratios are updated and uncertainties reduced. For the NP analysis both a model independent approach is used and concrete NP models are studied. The relations between $b\to s\nu \bar{\nu }$ and $b\to s{\ell }^{+}{\ell }^{-}$ transitions are analysed in detail.

Proceedings of the 8th International Workshop on the CKM Unitarity Triangle, 8-12 September 2014, Vienna, Austria; v2: references added