$b\to s\gamma$ Decay and Supersymmetry

Abstract

The inclusive radiative $B$-decay is a sensitive probe of new physics, especially if related to the virtual exchange of a charged Higgs boson. Supersymmetric models provide a particularly interesting example. In the limit of exact supersymmetry, BR($b\to s\gamma$)~=~0, due to the vanishing of any magnetic-moment transition operator. We illustrate the impact of this constraint for realistic values of the supersymmetry-breaking parameters.

7 pages, CERN-TH.6830/93 (Minor changes; a comment on the case $\tan \beta$ >1 has been added)

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