and vertex suppression in effective theories
1 Institut für Theoretische Physik III, Universität Erlangen-Nürnberg, Staudtstrasse 7, D-91058 Erlangen, Germany, (e-mail: email@example.com)
Received: 8 January 1999 Communicated by W. Weise
In an effective theory containing only quark degrees of freedom, such as the extended Nambu-Jona-Lasinio model, the influence of the axial anomaly can be incorporated by a self-interaction of the 't Hooft determinant type. I will show that despite the threshold problem related to the meson this leads to a significant suppression of the coupling to dynamical quarks which suggests a suppression of the NN vertex as compared to the NN vertex.
13.75-n Hadron-induced low- and intermediate-energy reactions and scattering - 14.40.Cs Other mesons with S=C=0, mass < 2.5 GeV - 12.39-x Phenomenological quark models