Determining the CP Violation Angle $\gamma$ in $B_s$ Decays without Hadronic Uncertainty

Bi-Hai Hong, Cai-Dian Lu

We study the rare decays $B_s^0\to D^{\pm }{\pi }^{\mp }$ and ${\bar{B}}_s^0\to D^{\mp }{\pi }^{\pm }$, which can occur only via annihilation type $W$ exchange diagrams in the standard model. The time-de…