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Phys. Rev. D 78, 012004 (2008) [13 pages]

Evidence for direct CP violation from Dalitz-plot analysis of B±K±ππ±

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B. Aubert et al. The BABAR Collaboration
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Received 31 March 2008; published 14 July 2008

We report a Dalitz-plot analysis of the charmless hadronic decays of charged B mesons to the final state K±ππ±. 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)%.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.78.012004
DOI:
10.1103/PhysRevD.78.012004
PACS:
13.25.Hw, 11.30.Er, 12.15.Hh