We present a simple interpretation of the recently observed near-threshold proton-antiproton enhancement. It is described by a set of low-energy parameters deduced from the analysis of $N\overline{N}$ experiments at the Low Energy Antiproton Ring. We predict a related effect in photoproduction reaction under study by CLAS Collaboration.

• Received 27 October 2003

DOI:https://doi.org/10.1103/PhysRevC.69.055205