Lattice QCD Spectroscopy with an Improved Wilson Fermion Action
  We study the hadronic spectrum in quenched lattice QCD using an improved Wilson fermion action (Hamber-Wu(1983),Eguchi-Kawamoto(1984)) at $\beta= 5.7$ and $\beta =6.0$. We find a systematic reduction of the finite spacing effects compared to the results obtained by using the standard Wilson action. 
M.-P. Lombardo, G.Parisi and A. Vladikas