Comparing Wilson and Clover Quenched $SU(3)$ Spectroscopy with an Improved Gauge Action

Abstract

We present results of quenched $SU(3)$ hadron spectroscopy comparing $\text{order}(a)$ improved Wilson (Clover) fermions with conventional Wilson fermions. The configurations were generated using an $\text{order}(a^2)$ improved 6-link $SU(3)$ pure gauge action at $\beta$'s corresponding to lattice spacings of $0.15$, $0.18$, $0.20$, $0.33$, and $0.43$ fm. We find evidence that fermionic scaling violations are consistent with $\text{order}(a^2)$ for Clover and $\text{order}(a)$ with a nonnegligible $\text{order}(a^2)$ term for standard Wilson fermions. This latter mixed ansatz makes a reliable continuum extrapolation problematic for Wilson fermions. We also find that the slope of the scaling violations is roughly $250MeV$ for both Wilson and Clover fermions.

Comments: 3 pages latex with 2 postscript figures. Talk presented at LATTICE96(spectrum)