Recent Results on non$-D\bar{D}$ decays of $\psi (3770)$ from BES

Hai-Long Ma

BES Collaboration measured the $R$ values at 3.650, 3.6648 and 3.773 GeV, the $R$ values at 68 energy points in the energy region between 3.650 and 3.872 GeV, the resonance paramet…