QCD CORRECTIONS TO B-]S-GAMMA-GAMMA INDUCED DECAYS - B-]X-S-GAMMA-GAMMA AND B-S-]GAMMA-GAMMA

We present a complete calculation of the leading-order QCD corrections to the quark level decay amplitude for b-->s gamma gamma and study th eir relevance for both the inclusive branching ratio B(B-->X-s gamma g amma) and for the exclusive decay channel B-s-->gamma gamma. In additi on to the uncertainties in the short distance calculation, due to the choice of the renormalization scale, an appreciable uncertainty in bot h B-s-->gamma gamma and B-->X-s gamma gamma is introduced by the matri x element calculation. We also briefly discuss some long distance effe cts, especially those due to the eta(c) resonance for the inclusive ra te. Finally, a brief analysis of the IR singularities of the two photo n spectrum in the inclusive case is given.