Belle: CPV with Kpipi/pipipi(rho pi)

We report results on studies of CP violation in the three-body charmless decay B ± → K ± π ± π ∓ and B 0 → π + π -π 0 (ρ 0 π 0 ).We find evidence at the 3.9σ level for large direct CP violation in the decay B ± → ρ(770) 0 K ± .This is the first evidence for CP violation in a charged meson decay.We also find evidence of B 0 → ρ 0 π 0 decay and perform the first measurement of the direct CP violating asymmetry in this mode.The measurements are based on a data sample that contains 386 million B B pairs collected with the Belle detector at the KEKB asymmetric-energy e + e -(3.5 on 8.0 GeV) collider.KEKB operates at the ϒ(4S) resonance ( √ s = 10.58GeV) with a peak luminosity that exceeds 1.5 × 10 34 cm -2 s -1 .