“Searching for Lepton Flavor Violation Decays

and at BES”

Guoliang TONG

Abstract:

Using a sample of events, the Beijing Spectrometer experiment

has searched for the decays

and. Four candidates for ,

zero candidate for and one candidate

for are observed, which consistent

with the estimated background. And upper limits on the branching ratios

of and of and

at the 90%C.L. are obtained respectively.