The radiative decay of $\psi(3770)$ into the predicted scalar state   X(3700)
  We calculate the radiative decay width of the $\psi(3770)$ into the dynamically generated scalar resonance X(3700) which is predicted in a previous paper. The results show that it is possible that the upgraded BEPC-II facility will generate enough statistics in order to observe this decay and thus confirm the existence of the X(3700). 
D. Gamermann, E. Oset and B.S. Zou