Constraints on the minimal supergravity model from theb→sγ decay

The constraints on the minimal supergravity model from the b→sγ decay are studied. A large domain in the parameter space for the model satisfies the CLEO bound B(b→sγ)<5.4×${10}^{\mathrm{-}4}$. However, the allowed domain is expected to diminish significantly with an improved bound on this decay. The dependence of the b→sγ branching ratio on various parameters is studied in detail. It is found that, for ${\mathit{A}}_{\mathit{t}}$0, however, the branching ratio is much less sensitive to small changes in ${\mathit{m}}_{\mathit{t}}$ and ${\mathrm{\alpha }}_{\mathit{G}}$.