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Mean-link tadpole improvement of SW and D234 actions

Authors
  • Alford, Mark
  • Klassen, Timothy R.
  • Lepage, Peter
Type
Published Article
Publication Date
Sep 26, 1997
Submission Date
Sep 26, 1997
Identifiers
DOI: 10.1016/S0920-5632(97)00922-5
Source
arXiv
License
Unknown
External links

Abstract

We investigate a tadpole-improved tree-level-O(a^3)-accurate action, D234c, on coarse lattices, using the mean link in Landau gauge to measure the tadpole contribution. We find that D234c shows much better rotational invariance than Sheikholeslami-Wohlert, and that mean-link tadpole improvement gives much better hadron mass scaling than plaquette tadpole improvement, with finite-a errors at 0.25 fm of only a few percent. We explore the effects of possible O(alpha_s) changes to the improvement coefficients, and find that the two leading coefficients can be independently tuned: hadron masses are only sensitive to the clover coefficient, while hadron dispersion relations are only sensitive to the third derivative coefficient. Preliminary non-perturbative tuning of these coefficients yields values that are consistent with the expected size of perturbative corrections.

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