Study of CP violation in Dalitz-plot analyses of B0K+KKS0, B+K+KK+, and B+KS0KS0K+

J. P. Lees et al. (BABAR Collaboration)
Phys. Rev. D 85, 112010 – Published 22 June 2012
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Abstract

We perform amplitude analyses of the decays B0K+KKS0, B+K+KK+, and B+KS0KS0K+, and measure CP-violating parameters and partial branching fractions. The results are based on a data sample of approximately 470×106 BB¯ decays, collected with the BABAR detector at the PEP-II asymmetric-energy B factory at the SLAC National Accelerator Laboratory. For B+K+KK+, we find a direct CP asymmetry in B+ϕ(1020)K+ of ACP=(12.8±4.4±1.3)%, which differs from zero by 2.8σ. For B0K+KKS0, we measure the CP-violating phase βeff(ϕ(1020)KS0)=(21±6±2)°. For B+KS0KS0K+, we measure an overall direct CP asymmetry of ACP=(45+4±2)%. We also perform an angular-moment analysis of the three channels and determine that the fX(1500) state can be described well by the sum of the resonances f0(1500), f2(1525), and f0(1710).

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  • Received 31 January 2012

DOI:https://doi.org/10.1103/PhysRevD.85.112010

© 2012 American Physical Society

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Vol. 85, Iss. 11 — 1 June 2012

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