Can the observed enhancement in the mass spectrum of p bar p in J/psi to gamma p bar p be interpreted by a possible p bar p bound state

Provided the enhancement in the $p bar{p}$ spectrum in radiative decay $J/psi to gamma p bar{p}$ observed by the BES collaboration is due to an existence of a $p bar{p}$ molecular state, we calculate its binding energy and lifetime in the linear $sigma$ model. We consider a possibility that the enhancement is due to a $p bar p$ resonance which is in either S-wave or P-wave structure and compare our results with the data.