Light Quenched Hadron Spectrum and Decay Constants on different Lattices

In this paper we study O(2000) (quenched) lattice configurations from the APE collaboration, for different lattice volumes and for 6.0 ≤ β ≤ 6.4 using both the Wilson and the SW-Clover fermion actions. We determine the light hadronic spectrum and meson decay constants and study the mesonic dispersion relation. We extract the hadronic variable J and the strange quark mass in the continuum at the next-to-leading order obtaining m s (μ = 2GeV ) = 122 ± 20 MeV . A study is made of their dependence on lattice spacing. We implement a newly developed technique to extract the inverse lattice spacing using data at the simulated values of the quark mass (i.e. at masses around the strange quark mass). PACS: 11.15.H, 12.38.Gc, 13.30.Eg, 14.20.-c and 14.40.-n Preprint submitted to Elsevier Preprint 7 February 2008