A Wilson-Majorana Regularization for Lattice Chiral Gauge Theories

Abstract

We discuss the regularization of chiral gauge theories on the lattice introducing only physical degrees of freedom. This is obtained by writing the Wilson term in a Majorana form, at the expense of the U(1) symmetry related to fermion number conservation. The idea of restoring chiral invariance in the continuum by introducing a properly chosen set of counterterms to be added to the tree level action is checked against one-loop perturbative calculations.

Comments: 29 pages, Latex file, no figures; references and a discussion on fermion number nonconservation added; version published in Nucl. Phys. B 507 (1997) 709