QCD with chiral 4-fermion interactions ($\chi$QCD)

Abstract

Lattice QCD with staggered quarks is augmented by the addition of a chiral 4-fermion interaction. The Dirac operator is now non-singular at $m_q=0$, decreasing the computing requirements for light quark simulations by at least an order of magnitude. We present preliminary results from simulations at finite and zero temperatures for $m_q=0$, with and without gauge fields.

Comments: 3 pages. uuencoded, gzipped, tared LateX with 2 encapsulated postscript figures. Uses epscrc2.sty. Talk presented at LATTICE96(chirality in qcd). Title changed; minor changes at beginning and end of paper and references