We analyze the partial rate asymmetry in $B^{ \pm} \to P { \bar P} \pi^{ \pm}$ decays ($ P = \pi^+, K ^+, \pi^0, \eta$) which results from the interference of the nonresonant decay amplitude and the resonant amplitude for $B^{ \pm} \to \chi_{ c0} \pi^{ \pm} $ followed by the decay $\chi_{ c0} \to P { \bar P} $. The CP violating phase $\gamma$ can be extracted from the measured asymmetry. We find that the partial rate asymmetry for $B^\pm \to \pi^+ \pi^- \pi^\pm$ is $0.33~sin \gamma$, while for $B^\pm \to K^+ K^-\pi^\pm$ it amounts $0.45~ sin \gamma$.
Categories: hep-ph