ar X iv : h ep - p h / 98 07 44 1 v 1 2 1 Ju l 1 99 8 Signal for CP violation in B ± → PP̄π ± decays

We analyze the partial rate asymmetry in B ± → P ¯ P π ± decays (P = π + , K + , π 0 , η) which results from the interference of the nonresonant decay amplitude and the resonant amplitude for B ± → χc0π ± followed by the decay χc0 → P ¯ P. The CP violating phase γ can be extracted from the measured asymmetry. We find that the partial rate asymmetry for B ± → π + π − π ± is 0.33 sinγ, while for B ± → K + K − π ± it amounts 0.45 sinγ. The measurement of CP asymmetries in charged B meson decays might provide us with a first demonstration of CP violation outside the K system [1,2]. One possibility to measure the CP odd phase γ = arg(V * ub) has been suggested in [3]. In this work the asymmetry appears as a result of the interference of the nonresonant decay B