Search for the lepton number violating process $\hat{I}{ž}^{-}\to \hat{I}{\pounds }^{+}{e}^{-}{e}^{-}+c.c.$

BESIII Collaboration, M. Ablikim, M. N. Achasov +691

We present a search for the lepton number violating decay $\hat{I}{ž}^{-}\to \hat{I}{\pounds }^{+}{e}^{-}{e}^{-}+c.c.$ with $(10087\pm 44)\times 10^6$ $J/\ddot{I}ˆ$ events collected by the BESIII detector at the BEPC…