De - Constraining Supersymmetry from b → sγ ?

We examine the process B → Xsγ in minimal supersymmetry (SUSY) with general flavor mixing in the squark sector. We include all important next–to–leading (NLO) QCD corrections as well as dominant NLO SUSY effects from the gluino field. We find a generic alignment between the gluino corrections to the down–type quark masses and to the dominant Wilson coefficients, which, for μ > 0, leads to a “focusing effect” of reducing NLO SUSY corrections relative to the LO. As a result, stringent constraints from BR(B → Xsγ) on the gluino mass can become significantly reduced relative to the minimal flavor violation scenario, especially at large tan β, even for small values of flavor mixing parameters. The case of μ < 0 can also become allowed. Constraints on general flavor mixings also become significantly relaxed relative to the LO case.