作者机构：
[Bai, JZ] Inst High Energy Phys, Beijing 100039, Peoples R China.;China Ctr Adv Sci & Technol, Beijing 100080, Peoples R China.;Colorado State Univ, Ft Collins, CO 80523 USA.;Henan Normal Univ, Xinxiang 453002, Peoples R China.;Huazhong Normal Univ, Wuhan 430079, Peoples R China.
通讯机构：
[Bai, JZ] I;Inst High Energy Phys, Beijing 100039, Peoples R China.
摘要：
Using a sample of 5.8×107J/ψ events, the Beijing Spectrometer experiment has searched for the decay J/ψ→eμ. Four candidates, consistent with the estimated background, are observed, and an upper limit on the branching fraction of J/ψ→eμ of 1.1×10−6 at the 90% C.L. is obtained.
