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 BB̄ 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)%.

Aubert, B., Bona, M., Karyotakis, Y., Lees, J., Poireau, V., Prencipe, E., et al. (2008). Evidence for direct CP violation from Dalitz-plot analysis of B±→K±ππ±. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 78(1) [10.1103/PhysRevD.78.012004].

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

CARPINELLI, Massimo;
2008

Abstract

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 BB̄ 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)%.
Articolo in rivista - Articolo scientifico
BABAR detector
English
2008
78
1
012004
none
Aubert, B., Bona, M., Karyotakis, Y., Lees, J., Poireau, V., Prencipe, E., et al. (2008). Evidence for direct CP violation from Dalitz-plot analysis of B±→K±ππ±. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 78(1) [10.1103/PhysRevD.78.012004].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/389622
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