Lattice QCD with Exponentially Small Chirality Breaking

Abstract

A new multifermion formulation of lattice QCD is proposed. The model is free of spectrum doubling and preserves all nonanomalous chiral symmetries up to exponentially small corrections. It is argued that a small number of fermion fields may provide a good approximation making computer simulations feasible.

Comments: 14 pages, no figures; typos corrected