1303.0660 (Wenyu Wang et al.)

Complete Analysis on the Short Distance Contribution of $B_s\to
\ell^+\ell^-γ$ in Standard Model    [PDF]

Wenyu Wang, Zhao-Hua Xiong, Si-Hong Zhou

Using the $B_s$ meson wave function extracted from non-leptonic $B_s$ decays, we evaluate the short distance contribution of rare decays $B_s\to \ell^+\ell^-\gamma(\ell=e,\mu)$ in the standard model, including all the possible diagrams. We focus on the contribution from four-quark operators which are not taken into account properly in previous researches. We found that the contribution is large, leading to the branching ratio of $B_s\to \ell^+\ell^-\gamma$ being nearly enhanced by a factor 3 and up to $1.7\times 10^{-8}$. The predictions for such processes can be tested in the LHC-b and B factories in near future.

View original: http://arxiv.org/abs/1303.0660