QCD corrections to b→sγγ and exclusive Bs→γγ decay
1997; Elsevier BV; Volume: 415; Issue: 4 Linguagem: Inglês
10.1016/s0370-2693(97)01208-2
ISSN1873-2445
AutoresChia-Hung V. Chang, Guey-Lin Lin, York-Peng Yao,
Tópico(s)High-Energy Particle Collisions Research
ResumoThe 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.
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