Overlap fermions on a 20(4) lattice

We report results on hadron masses, fitting of the quenched chiral log, and quark masses from Neuberger's overlap fermion on a quenched 20(4) lattice with lattice spacing a = 0.15 fm. We used the improved gauge action which i s shown to lower the density of small eigenvalues for HZ as compared to the Wilson gauge action. This makes the calculation feasible on 64 nodes of CR AY-T3E. Also presented is the pion mass on a small volume (6(3) x 12 with a Wilson gauge action at beta = 5.7). We find that for configurations that t he topological charge Q not equal 0, the pion mass tends to a constant and for configurations with trivial topology, it approaches zero possibly linea rly with the quark mass.