标题： BABAR实验的物理研究 显示英文标题

标题： Physics at BABAR

摘要： BABAR探测器在SLAC PEP-II不对称e+e-对撞机上从1999年5月开始收集数据。 基于在Y(4S)共振处采集的9.0 fb^-1数据样本和截至2000年7月采集的0.8 fb^-1非共振数据样本，进行了B0 → J/ψK0S 和 B0 → ψ(2S)K0S 衰变中的时间相关CP破坏不对称性的研究。 这里展示了初步结果 sin2β = 0.12 ± 0.37（统计误差）± 0.09（系统误差），以及关于中性B介子和带电B介子寿命及B0B0bar混合的初步结果。 显示英文摘要

摘要： The BABAR detector at the SLAC PEP-II asymmetric e+e- collider has first started collecting data in May 1999. A study of time-dependent CP-violating asymmetries in B0 --> J/psi K0S and B0 --> psi(2S) K0S decays has been performed on a data sample of 9.0fb-1 taken at the Y(4S) resonance and 0.8fb-1 off-resonance, collected through July 2000. The preliminary result sin2beta = 0.12+/-0.37 (stat) +/- 0.09 (syst) is presented here, together with preliminary results on neutral and charged B meson lifetimes and B0B0bar mixing.