Search for the lepton number violating decay ${\Sigma }^{-}\to p{e}^{-}{e}^{-}$ and the rare inclusive decay ${\Sigma }^{-}\to {\Sigma }^{+}X$

BESIII Collaboration, M. Ablikim, M. N. Achasov +499

Using a data sample of $(1310.6\pm 7.0)\times 10^6$ $J/\psi$ events taken with the BESIII detector at the center-of-mass energy of 3.097 GeV, we search for the first time for the…