The short distance QCD corrections to b → sγγ are calculated in the leading logarithmic approximation. The equivalence of operator basis reduction for S-matrix elements by using the equations of motion or by proving a low energy theorem is discussed. We apply the above results to the exclusive Bs → γγ decay. The branching ratio of this decay is found to be 5 × 10-7 in the Standard Model. We also found that QCD corrections modify considerably the ratio between CP-even and CP-odd two-photon amplitudes.
|頁（從 - 到）||395-401|
|期刊||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|出版狀態||已發佈 - 1997 12月 25|
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