Hunting for direct CP violation in ${\bar{B}}_s^0\to {\pi }^{+}{\pi }^{-}{K}^{\ast 0}$

Sheng-Tao Li, Gang Lü

In perturbative QCD approach, based on the first order of isospin symmetry breaking, we study the direct $CP$ violation in the decay of $\bar{B}_s^0\toρ(ω)K^{*0}\to {π^+}{π^-}K^{*0…