Rare B \to K^{(*)} ν\barνDecays at B Factories

Abstract

We compute the branching fraction of the decays $B\to K\nu \bar{\nu }$ and $B\to K^{\ast }\nu \bar{\nu }$ in the Standard Model. We also comment on the experimental difficulties and procedures to detect such modes at B factories.

arXiv comment11 pages LaTeX + 2 eps figures. Version published in Physics Letters B

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