Weak annihilation rare radiative B-decays

TL;DR

This paper predicts the branching ratios of rare radiative B-decays that occur via weak annihilation, providing new estimates for specific decay modes with about 20% accuracy.

Contribution

It extends previous analyses by estimating branching ratios for $ar{B}^0_s o D^{*0}\gamma$ and $B_c^- o ho^-\gamma$ decays.

Findings

Branching ratio for $ar{B}^0_s o D^{*0}\gamma$ is approximately 2.87×10^{-9}.

Branching ratio for $B_c^- o ho^-\gamma$ is approximately 2.59×10^{-7}.

Predictions have an estimated accuracy of 20%.

Abstract

We give predictions for the branching ratios of several rare radiative B-decays which proceed only through weak annihilation mechanism. In addition to previous analysis we estimate the branching ratios of $\bar{B}^0_s\to D^{*0}\gamma$ and $B_c^-\to\rho^-\gamma$ decays and obtain $2.87\cdot 10^{-9}$ and $2.59\cdot 10^{-7}$ for them correspondingly. The accuracy of the predictions is at the level of 20\%.