The inclusive branching ratio $B\to X_s\gamma$ and the anomalous magnetic moment $g_{\mu }-2\mathrm{}$ of the muon are accurately calculated within a minimal gauge-mediated supersymmetry-breaking model which naturally generates a large $\tan \beta$. The predictions are strongly correlated, and in somewhat better agreement with current experiments; new data will soon critically test these predictions. Predictions for $B\to X_s{\ell }^{+}{\ell }^{-}$ branching ratios and asymmetries, to be tested at future colliders, are also presented.

• Received 6 August 1997

DOI:https://doi.org/10.1103/PhysRevLett.79.4752