B → Xₛ γ in minimal supersymmetric standard model with general flavor mixing

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We present the results of our analysis on b → s γ in the minimal supersymmetric standard model with a general flavor mixing in the squark sector. We identify the next--to--leading order focusing effect, which considerably reduces the gluino contribution to b → s γ relative to the leading order calculation. We illustrate that BR(B → Xₛ γ) is still very sensitive to the flavor mixing parameters, δᵈll and δᵈlr so that the lower bound for m₁/₂ obtained in the minimal flavor violation can be easily removed even at μ<0, while it is rather stable against δᵈrr and δᵈrl.