Two-photon exclusive decays $B_s \to η(η') γγ$ and $B \to K γγ$

Details Two-photon exclusive decays $B_s \to η(η') γγ$ and $B \to K γγ$ Two-photon exclusive decays $B_s \to η(η') γγ$ and $B \to K γγ$

1997-06-08

arxiv.org/abs/hep-ph/9706286v1

Phys.Rev. D56 (1997) 4274-4277

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 Pages

Scientific paper

10.1103/PhysRevD.56.4274

The exclusive decay modes $B \to K \gamma\gamma$ and $B_s \to \eta (\eta') \gamma\gamma$ are shown to have significant branching ratios of approximately $0.5\times 10^{-7}$. This first calculation of these modes employs a model based on a cascade transition $B\to V\gamma\to P\gamma\gamma$ for estimating the long-distance contribution and the process $b\to s\gamma\gamma$ for the short distance one.

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