Analytical Forms for Cross Sections of Di-lepton Production from $e^{+}{e}^{-}$ Collisions around the $J/\psi$ Resonance

Xing-Yu Zhou, Ya-Di Wang, Li-Gang Xia

A detailed theoretical derivation of the cross sections of $e^{+}{e}^{-}\to e^{+}{e}^{-}$ and $e^{+}{e}^{-}\to {\mu }^{+}{\mu }^{-}$ around the $J/\psi$ resonance is reported. The resonance and interference parts…