Abstract:
We present a model for generation of fermion masses by means of dynamical symmetry breaking. This mechanism has recently been applied to electroweak interactions. We start with general considerations and show how the broken symmetry is manifested in the analytic structure of the Green's functions. The Goldstone theorem implies the existence of a massless Nambu-Goldstone mode, whose properties are then extracted from the Ward identities for the broken symmetry. Finally we show how the symmetry-breaking self-energy is calculated from the truncated Schwinger-Dyson equations. The structure of our model improves the convergence of the Schwinger-Dyson kernel.