Influence of relativistic effects on the level widths of baryonium
Karmanov V. A., Shapiro I. S.
Estimates have shown that the relativistic effects change the level widths of baryonmm by no more than a factor of 2 or 3 down the energy scale. The earlier predictions, based on the potential scheme, concerning the existence of a spectrum of relatively narrow states (on the order of 10 MeV) in the NN system remain in force even when the relativistic corrections are taken into account.