F(N-PI-N) - FROM QUARKS TO THE PION DERIVATIVE COUPLING

We study the N pi N coupling, in the framework of a QCD-inspired confi ning Nambu-Jona-Lasinio model. A simple relativistic confining and ins tantaneous quark model is reviewed. The Salpeter equation for the qqq nucleon and the <q(q)over bar> boosted pion is solved. The f(n pi n) a nd f(n pi Delta) couplings are calculated and they turn out to be reas onably good. The sensibility of f(n pi n) and f(n pi Delta) to confine ment, chiral symmetry breaking, and Lorentz invariance is briefly disc ussed.