Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2001-10-22
Nucl.Phys.Proc.Suppl. 106 (2002) 739-747
Physics
High Energy Physics
High Energy Physics - Lattice
LATTICE2001(Chiral Fermions and Gauge Theories), 9 pages, 5 figure, CPT 2001/P.4250
Scientific paper
We present results of a quenched QCD simulation with overlap fermions on a lattice of volume V = 16^3X32 at beta=6.0, which corresponds approximatively to a lattice cutoff of 2 GeV and an extension of 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 + \hat 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.
Giusti Leonardo
Hoelbling Christian
Rebbi Claudio
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