CP Violating B ---> s Gamma Decay in Supersymmetric Models

Supersymmetric models with nonuniversal down type squark masses can enrich the chiral structure and CP violating phenomena in $b\to sγ$ decays. Direct CP violation in $b\to s γ$, mixing induced CP violation in radiative $B_{d,s}$ decays (such as $B_s\to ϕγ$ and $B_d \to K^*_{1,2}γ$), and $Λ$ polarization in $Λ_b \to Λγ$ can be substantially different from the Standard Model. Future experiements at $e^+ e^-$ and hadronic B factories will give important information on the underlying theory for radiative $b$ decays.

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