Estimates of Long-distance Contributions to the $B_s\to \gamma \gamma$ Decay

Abstract

We present first calculations of new long-distance contributions to $B_s\to \gamma \gamma$ decay due to intermediate $D_s$ and $D_s^{\ast }$ meson states. The relevant $\gamma$ vertices are estimated using charge couplings and transition moment couplings. Within our uncertainties, we find that these long-distance contributions could be comparable to the known short-distance contributions. Since they have different Cabibbo-Kobayashi-Maskawa matrix-element factors, there may be an interesting possibility of observing CP violation in this decay.

9 pages, 2 figures (embedded), all style files included

References in corpus (1)

• QCD corrections to b -> s gamma gamma induced decays: B -> X_s gamma gamma and B_s -> gamma gamma

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