Search for the rare semi-leptonic decay $J/\psi \to D^{-}{e}^{+}{\nu }_e+c.c.$

BESIII Collaboration, M. Ablikim, M. N. Achasov +503

Using $10.1\times 10^9$ $J/\psi$ events produced by the Beijing Electron Positron Collider (BEPCII) at a center-of-mass energy $\sqrt{s}=3.097\mathrm{GeV}$ and collected with the BESIII…