Search for the lepton flavor violating decay $J/\psi \to e\mu$

BESIII Collaboration, M. Ablikim, M. N. Achasov +563

We present a search for the lepton flavor violating decay $J/\psi \to e^{\pm }{\mu }^{\mp }$ using $8.998\times 10^{9}J/\psi$ events collected with the BESIII detector at the BEPCII $e^{+}{e}^{-}$ st…