标题： 半轻子B衰变中强子质量分布的矩测量 显示英文标题

标题： Measurements of Moments of the Hadronic Mass Distribution in Semileptonic B Decays

摘要： 我们报告了在B → X_c lv衰变中强子质量分布的前四个矩的测量结果。 这些测量基于8900万对Upsilon(4S) → BBbar事件，其中其中一个B介子的强子衰变被完全重建，另一个B介子衰变产生的带电轻子被识别。 这些矩是在B介子静止系中最小轻子动量从0.9到1.6 GeV范围内给出的。 预计这样的测量将有助于更精确地确定|V_{cb}|和|V_{ub}|。 显示英文摘要

摘要： We report a measurement of the first four moments of the hadronic mass distribution in B --> X_c lv decays. The measurements are based on 89 million Upsilon(4S) --> BBbar events where the hadronic decay of one of the B mesons is fully reconstructed and a charged lepton from the decay of the other B meson is identified. The moments are presented for minimum lepton momenta ranging from 0.9 to 1.6 GeV in the B rest frame. It is expected that such measurements will lead to improved determinations of |V_{cb}| and |V_{ub}|.