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arXiv · hep-lat/9711052

The Effectiveness of Non-Perturbative O(a) Improvement in Lattice QCD

R. G. Edwards·U. M. Heller·T. R. Klassen
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Abstract

The ALPHA collaboration has determined the O(a) improved Wilson quark action for lattice spacings $a\leq 0.1$ fm, in the quenched approximation. We extend this result to coarser lattices, $a\leq 0.17$ fm, and calculate the hadron spectrum on them. The large range of lattice spacings obtained by combining our results with earlier ones on finer lattices, allow us to present a convincing demonstration of the efficiency of non-perturbative O(a) improvement. We find that scaling violations of the hadron masses studied drop from 30-40% for the unimproved Wilson action on the coarsest lattice to only 2-3%.

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R. G. Edwards, U. M. Heller, T. R. Klassen. 1998-03-31. The Effectiveness of Non-Perturbative O(a) Improvement in Lattice QCD. https://doi.org/10.1103/physrevlett.80.3448

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