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Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, France.
Phys Rev Lett. 2004 Apr 9;92(14):141801. doi: 10.1103/PhysRevLett.92.141801.
We present a study of the decay B--->D(0)K(-) based on a sample of 86 x 10(6) Upsilon(4S)-->BBmacr; decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We measure the branching fraction B(B--->D(0)K(-))=(8.3+/-1.1(stat)+/-1.0(syst)) x 10(-4), and the fraction of longitudinal polarization in this decay to be Gamma(L)/Gamma=0.86+/-0.06(stat)+/-0.03(syst).
我们基于在SLAC的PEP-II非对称能量B工厂使用BABAR探测器收集的86×10⁶个Υ(4S)→BB̅衰变样本，对B⁻→D⁰K⁻衰变进行了一项研究。我们测量了分支比B(B⁻→D⁰K⁻) = (8.3±1.1(统计)±1.0(系统))×10⁻⁴，以及该衰变中纵向极化的比例为Γ(L)/Γ = 0.86±0.06(统计)±0.03(系统)。
