Quenched results for light quark physics with overlap fermions

We present results of a quenched QCD simulation with overlap fermions on a lattice of volume V = 16(3) x 32 at beta = 6.0, which corresponds to a lattice cutoff' of similar or equal to 2 GeV and an extension of similar or equal to 1.4 fm. From the two-point correlation functions of bilinear operators we extract the pseudoscalar meson masses and the corresponding decay constants. From the GMOR relation we determine the chiral condensate and, by using the K-meson mass as experimental input, we compute the sum of the strange and average up-down quark masses (m(s) + m). The needed logarithmic divergent renormalization constant Z(S) is computed with the RI/MOM non-perturbative renormalization technique. Since the overlap preserves chiral symmetry at finite cutoff and volume, no divergent quark mass and chiral condensate additive renormalizations are required and the results are O(a) improved.