Hadron spectroscopy and static quark potential in full QCD: A comparison of improved actions on the CP-PACS

Abstract

We present first results from a full QCD calculation on the CP-PACS, comparing various actions at $a^{-1} \sim 1 GeV$ and $m_π/m_ρ\approx 0.7$--0.9. We use the plaquette and a renormalization group improved action for the gluons, and the Wilson and the SW-Clover action for quarks. We find that significant improvements in the hadron spectrum results from improving the quarks, while the gluon improvement is required for a rotationally invariant static potential. An ongoing effort towards exploring the chiral limit in full QCD is described.

6 pages, based on talks presented by R. Burkhalter and T. Kaneko at Lattice97, Edinburgh