We perform amplitude analyses of the decays B0→K +K -KS0, B +→K +K -K +, and B +→KS0KS0K +, and measure CP-violating parameters and partial branching fractions. The results are based on a data sample of approximately 470×106 BB̄ decays, collected with the BABAR detector at the PEP-II asymmetric-energy B factory at the SLAC National Accelerator Laboratory. For B +→K +K -K +, we find a direct CP asymmetry in B +→(1020)K + of A CP=(12.8±4.4±1.3)%, which differs from zero by 2.8σ. For B0→K +K -KS0, we measure the CP-violating phase β eff((1020)KS0)=(21±6±2)°. For B +→KS0KS0K +, we measure an overall direct CP asymmetry of A CP=(4-5+4±2)%. We also perform an angular-moment analysis of the three channels and determine that the f X(1500) state can be described well by the sum of the resonances f 0(1500), f2′(1525), and f 0(1710).
Lees, J., Poireau, V., Tisserand, V., Garra Tico, J., Grauges, E., Milanes, D., et al. (2012). Study of CP violation in Dalitz-plot analyses of B0→K+K-KS0, B+→K+K-K+, and B+→KS0KS0K+. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 85(11) [10.1103/PhysRevD.85.112010].
Study of CP violation in Dalitz-plot analyses of B0→K+K-KS0, B+→K+K-K+, and B+→KS0KS0K+
Martinelli M.;CARPINELLI, MassimoMembro del Collaboration Group
;
2012
Abstract
We perform amplitude analyses of the decays B0→K +K -KS0, B +→K +K -K +, and B +→KS0KS0K +, and measure CP-violating parameters and partial branching fractions. The results are based on a data sample of approximately 470×106 BB̄ decays, collected with the BABAR detector at the PEP-II asymmetric-energy B factory at the SLAC National Accelerator Laboratory. For B +→K +K -K +, we find a direct CP asymmetry in B +→(1020)K + of A CP=(12.8±4.4±1.3)%, which differs from zero by 2.8σ. For B0→K +K -KS0, we measure the CP-violating phase β eff((1020)KS0)=(21±6±2)°. For B +→KS0KS0K +, we measure an overall direct CP asymmetry of A CP=(4-5+4±2)%. We also perform an angular-moment analysis of the three channels and determine that the f X(1500) state can be described well by the sum of the resonances f 0(1500), f2′(1525), and f 0(1710).
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