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Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, France.
Phys Rev Lett. 2007 Feb 2;98(5):051803. doi: 10.1103/PhysRevLett.98.051803.
We present a measurement of the branching fraction and time-dependent CP asymmetry of B(0)-->rho0K0. The results are obtained from a data sample of 227x10(6) Upsilon(4S)-->BB decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at Stanford Linear Accelerator Center. From a time-dependent maximum likelihood fit yielding 111+/-19 signal events, we find B(B(0)-->rho0K0)=(4.9+/-0.8+/-0.9)x10(-6), where the first error is statistical and the second systematic. We report the measurement of the CP parameters S(rho)(0)K(0)S=0.20+/-0.52+/-0.24 and C(rho)(0)K(0)S=0.64+/-0.41+/-0.20.
我们给出了B(0)→ρ0K0分支比和时间相关CP不对称性的测量结果。这些结果来自于在斯坦福直线加速器中心的PEP-II非对称能量B工厂使用BABAR探测器收集的227×10(6)个Υ(4S)→BB衰变的数据样本。通过一个产生111±19个信号事件的时间相关最大似然拟合，我们发现B(B(0)→ρ0K0)=(4.9±0.8±0.9)×10(-6)，其中第一个误差是统计误差，第二个是系统误差。我们报告了CP参数S(ρ)(0)K(0)S = 0.20±0.52±0.24和C(ρ)(0)K(0)S = 0.64±0.41±0.20的测量结果。
