SPIN EFFECTS IN THE RADIATIVE B-]S-GAMMA-G DECAY OF A POLARIZED B-QUARK

Using the general formalism of structure functions (SF's), the polariz ation effects in the rare radiative decay of polarized b quarks, b --> s gamma g, are analyzed. Parametrizing the matrix element for the dec ay b --> s gamma g in terms of weak magnetic moments, which describe t he transitions b --> s gamma and b --> sg, we find exact expressions f or the SF's which are valid for a wide class of models for the FCNC's. We demonstrated that the different asymmetries in this decay are very sensitive to the model of FCNC's. The numerical calculations (with an d without QCD corrections) show that asymmetry in b --> gamma(sg) is l arge in absolute value and its energy dependence is very sensitive to the choice of model. We also analyze the relative importance of differ ent contributions to the asymmetry in b --> gamma(sg).