We present a search for the lepton flavor violating decay $J/psi o
e^{pm}mu^{mp}$ using $8.998 imes 10^{9} J/psi$ events collected with the
BESIII detector at the BEPCII $e^+e^-$ storage ring. No excess of signal above
background is observed; we therefore set an upper limit on the branching
fraction of $mathcal{B}(J/psi o e^{pm}mu^{mp})<4.5 imes10^{-9}$ at the
$90\%$ confidence level. Improving the previous best result by a factor of more
than 30, this measurement places the most stringent limit to date on lepton
flavor violation in the heavy quarkonium sector.
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
REGISTER
Did you like this article? 
