The cross section of the process $e^{+}+e^{-}\to J/\psi +{\eta }_c$ within the QCD light-cone sum rules

Yan-Jun Sun, Xing-Gang Wu, Fen Zuo +1

We calculate the cross section of the exclusive process $e^{+}+e^{-}\to J/\psi +{\eta }_c$ at the leading order approximation within the QCD light-cone sum rules (LCSR) approach. It is foun…