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 $a^{-1}\sim 1GeV$ and $m_{\pi }/m_{\rho }\approx 0.7$--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.

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