Review of Experimental Studies of $\psi (3770)$ non-$D\bar{D}$ Decays

G. Rong, D. Zhang, J. C. Chen

We review the progress on experimental studies of the non-$D\bar{D}$ decays of the $\psi (3770)$ resonance. With the world average of the observed cross sections for $D\bar{D}$ productio…