The puzzle of excessive non-$D\bar{D}$ component of the inclusive $\psi (3770)$ decay and the long-distant contribution

Xiang Liu, Bo Zhang, Xue-Qian Li

In this letter we suggest that the obvious discrepancy between theoretical prediction on the $\mathrm{non}-D\bar{D}$ decays of $\psi (3770)$ and data is to be alleviated by taking final…