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Laboratoire de Physique des Particules, IN2P3/CNRS et Université de Savoie, F-74941 Annecy-Le-Vieux, France.
Phys Rev Lett. 2007 Oct 19;99(16):161802. doi: 10.1103/PhysRevLett.99.161802.
We analyze the decay B0-->K+K-K0 using 383 x 10(6) BB events collected by the BABAR detector at SLAC to extract CP violation parameter values over the Dalitz plot. Combining all K+K-K0 events, we find ACP=-0.015+/-0.077+/-0.053 and beta eff = 0.352+/-0.076+/-0.026 rad, corresponding to a CP violation significance of 4.8 sigma. A second solution near pi/2-beta eff is disfavored with a significance of 4.5 sigma. We also report ACP and beta eff separately for decays to phi(1020)K0, f0(980)K0, and K+K-K0 with mK+K- > 1.1 GeV/c2.
我们使用SLAC的BABAR探测器收集的383×10⁶个BB事件，分析衰变B⁰→K⁺K⁻K⁰，以提取达利兹图上的CP破坏参数值。综合所有K⁺K⁻K⁰事件，我们发现ACP = -0.015±0.077±0.053且βeff = 0.352±0.076±0.026弧度，对应于4.8σ的CP破坏显著性。在π/2 - βeff附近的第二个解以4.5σ的显著性被排除。我们还分别报告了衰变到φ(1020)K⁰、f₀(980)K⁰以及mK⁺K⁻ > 1.1 GeV/c²的K⁺K⁻K⁰时的ACP和βeff。
