We apply the $1/N_c$ expansion in QCD to the baryon vertices. We find new model independent properties for the isoscalar and isovector baryon vertices from the view point of $1/N_c$ expansion in QCD. One of these results, $I=J$ rule, have been already found. The other properties, new $I=J$ rules, are the rules about the isospin and strangeness dependence for the baryon vertices.
Categories: hep-ph nucl-th