A possible mechanism for producing the threshold enhancement in $J/\psi \to \gamma p\bar{p}$

Xiao-Hai Liu, Yuan-Jiang Zhang, Qiang Zhao

In the $J/\psi$ radiative decay channels $J/\psi \to \gamma V\bar{V}$, the result of partial wave analysis indicates that the $V\bar{V}$ systems are predominately pseudoscalar component, and mo…