摘要
Using a data sample of about 33pb^-1 collected at and around √s = 3.773 GeV with the BES-Ⅱ detector at the BEPC, we have directly measured the branching fraction for inclusive semimuonic decay of neutral D mesons to be BF(D^0 → μ^+X) = (7.2 ± 1.5 ± 0.8)%.
Using a data sample of about 33pb^-1 collected at and around √s = 3.773 GeV with the BES-Ⅱ detector at the BEPC, we have directly measured the branching fraction for inclusive semimuonic decay of neutral D mesons to be BF(D^0 → μ^+X) = (7.2 ± 1.5 ± 0.8)%.
基金
Supported by National Natural Science Foundation of China of China under Grant Nos 10491300, 10225524, 10225525, 10425523, 10625524 and 10521003, the Knowledge Innovation Project of Chinese Academy Sciences under Grant No KJ95T- 03, 100 Talents Program of Chinese Academy Sciences (U-11, U-24, U-25), the Knowledge Innovation Project of Chinese Academy Sciences (U-602, U-34).