S-wave contributions in ${\bar{B}}_s^0\to (D^0,{\bar{D}}^0){\pi }^{+}{\pi }^{-}$ within perturbative QCD approach

Ye Xing, Zhi-Peng Xing

The ${\bar{B}}_s^0\to (D^0,{\bar{D}}^0){\pi }^{+}{\pi }^{-}$ is induced by the $b\to c\bar{u}s$/$b\to u\bar{c}s$ transition, and can interfere if a CP-eigenstate $D_{\mathrm{CP}}$ is formed. The interfere…