A study on the rare radiative decay $B_c \to D_s^* γ$

Dongsheng Du; Xiulin Li; Yadong Yang

doi:10.1016/0370-2693(96)00483-2

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arXiv · hep-ph/9603291

A study on the rare radiative decay $B_c \to D_s^* γ$

Dongsheng Du·Xiulin Li·Yadong Yang

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Abstract

We study the decay $B_c \rightarrow D_s^* γ$. There are two mechanisms contributing to the process. One proceeds through the short distance $b{\rightarrow}sγ$ transition and the other occurs through weak annihilation accompanied by a photon emission.The electromagnetic penguin contribution is estimated by perturbative QCD and found to be $4.68\times10^{-18}$ GeV. In particular, we find the contribution of the weak annihilation is $6.25\times10^{-18}GeV$ which is in the same order as that of the electromagnetic penguin. The total decay rate $Γ(B_c \rightarrow D_s^* γ)$ is predicted to be $1.45\times10^{-17}GeV$ and the branching ratio $Br(B_c \rightarrow D_s^* γ)$ is predicted to be $2.98\times 10^{-5}$ for $τ_{B_c}=1.35ps$. The the decays $B_c \rightarrow D_s^* γ$ can be well studied at LHC in the near future.

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Dongsheng Du, Xiulin Li, Yadong Yang. 1996-03-13. A study on the rare radiative decay $B_c \to D_s^* γ$. https://doi.org/10.1016/0370-2693(96)00483-2

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