Search for the weak decays $J/\psi \to D_s^{(\ast )}e{\nu }_e$

BESIII collaboration, M. Ablikim, M. N. Achasov +405

Using a sample of $2.25\times 10^8$ $J/\psi$ events collected with the BESIII detector at the BEPCII collider, we search for the $J/\psi$ semi-leptonic weak decay $J/ψ\to D^{-}_{s} e^{+}…