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 BB̅ 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+→ϕ(1020)K+ of ACP=(12.8±4.4±1.3)%, which differs from zero by 2.8σ. For B0→K+K-KS0, 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=(4-5+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).

Study of CP violation in Dalitz-plot analyses of B^{0}→K^{+}K^{-}K_{S}^{0}, B^{+}→K^{+}K^{-}K^{+}, and B^{+}→K_{S}^{0}K_{S}^{0}K^{+}

CONTRI, ROBERTO;LO VETERE, MAURIZIO;MONGE, MARIA ROBERTA;
2012-01-01

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 BB̅ 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+→ϕ(1020)K+ of ACP=(12.8±4.4±1.3)%, which differs from zero by 2.8σ. For B0→K+K-KS0, 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=(4-5+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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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11567/393987
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