Light-Front Aspects of Chiral Symmetry
arXiv:hep-th/0008236 · doi:10.1016/S0920-5632(00)00873-2
Abstract
Spontaneous chiral symmetry breaking and axial anomaly are studied in the light-front formulation. The existence of multiple vacua and a Nambu-Goldstone boson, both related to dynamical fermion zero modes, are demonstrated within a simple sigma model with fermions. The Weyl gauge formulation and a consistent gauge invariant point-splitting regularization, which includes the light front time, are crucial for obtaining the anomaly in the massive Schwinger model and QED(3+1).
5 pages, Latex2e, uses elsart.cls, to apper in the proceedings of the X. International Light-Cone Meeting, Heidelberg, June 2000