Aubert, B. et al. (2008) Evidence for direct CP violation from Dalitz-plot analysis of B±→K±π∓π±. Physical Review D, 78 (1). 012004. ISSN 1550-7998
Abstract

We report a Dalitz-plot analysis of the charmless hadronic decays of charged B mesons to the final state K±π∓π±. Using a sample of (383.2±4.2)×106 BB̅ pairs collected by the BABAR detector, we measure CP-averaged branching fractions and direct CP asymmetries for intermediate resonant and nonresonant contributions. We find evidence for direct CP violation in the decay B±→ρ0(770)K±, with a CP-violation parameter ACP=(+44±10±4-13+5)%.

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