Quenched SU(3) hadron spectroscopy using improved fermionic and gauge actions

The Symanzik action improvement program has been proposed [1,2] as a way to reduce scaling violations in the approach to the continuum limit from a lattice action. In another contribution, we report on our preliminary investigations into the nature of scaling violations inherent in improved actions. In another proceedings in this volume[4], we make detailed comparisons of Wilson and tadpole-improved Clover fermion actions on configurations with dynamical fermion content. In this work, we perform SU(3) quenched spectroscopy using a one-loop tadpoleimproved Symanzik pure gauge action and the tree-level tadpole-improved Clover fermion action. We measure the hadron spectrum and the string tension at lattice spacings 0.15, 0.18, 0.20, 0.25, and 0.43 fm. The goal of this work is to measure the lattice spacing dependence of the hadron spectrum. We find significant scaling violations in amK∗/ √ a2σ consistent with O(a2).