ON THE QCD CORRECTIONS TO B-]S-GAMMA IN SUPERSYMMETRIC MODELS

We reinvestigate the leading QCD corrections to the radiative decay b --> sy for supersymmetric extensions of the Standard Model, Although t he major contributions to the corrections originate from the running o f the effective Lagrangian from the W scale down to the b scale, addit ional corrections are expected from large mass splittings between the particles running in the loops, as well as from integrating out heavy particles at scales different from the W mass. The calculation is perf ormed in the framework of effective field theories.