Chiral symmetry breaking from Ginsparg-Wilson fermions

Abstract

We calculate the large-volume and small-mass dependences of the quark condensate in quenched QCD using Neuberger's operator. We find good agreement with the predictions of quenched chiral perturbation theory, enabling a determination of the chiral lagrangian parameter \Sigma, up to a multiplicative renormalization.

Comments: LATTICE99(Chiral Fermions), 3 pages, 1 figure. Poster presented by L. Lellouch at the XVIIth International Symposium on Lattice Field Theory, Pisa, Italy, June 29--July 3, 1999. Points accidentally omitted in figure restored; minor stylistic changes