| Abstract: | For the Nambu-Jona-Lasinio model in the regime of dynamical symmetry breaking we formulate principles for selecting 4-fermion models as a low-energy approximation of QCD. On their basis, by means of an effective potential, we consider the possibility of their intrinsic stabilization at a finite cutoff momentum  . In the framework of the approach, we investigate the influence of the gluon condensate on the parameters of the model and the effective lagrangian in the low-energy region.St Petersburg State University. Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 93, No. 1, pp. 67–86, October, 1992. |
