The Effect of Pion Exchange in a Relativistic Quark Model of Baryons
  We examine the effect of adding pion exchange between quarks and pion self-energy corrections to the Los Alamos Relativistic Quark model with a short distance cutoff of the Bethe form. The contributions to the nucleon and the Delta-baryon are small. We conclude that the model is stable under this change in the sense that significant changes to the model parameters are not required. 
T. Goldman and R.R. Silbar