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

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

1998-04-15

arxiv.org/abs/hep-ph/9804300v1

Phys.Lett.B433:102-108,1998

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

10.1016/S0370-2693(98)00679-0

We present first calculations of new long-distance contributions to $B_s \to \gamma \gamma$ decay due to intermediate $D_s$ and $D_s^*$ 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.

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