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arXiv · hep-lat/9412035

QCD on Coarse Lattices

M. Alford·W. Dimm·G. Hockney·P. Lepage·P. Mackenzie
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Abstract

We show that the perturbatively-improved gluon action for QCD, once it is tadpole-improved, gives accurate results even with lattice spacings as large as 0.4~fm. {\em No\/} tuning of the couplings is required. Using this action and lattice spacing, we obtain a static potential that is rotationally invariant to within a few percent, the spin-averaged charmonium spectrum accurate to within 30--40~MeV, and scaling to within 5--10\%. We demonstrate that simulations on coarse lattices are several orders of magnitude less costly than simulations using current methods.

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M. Alford, W. Dimm, G. Hockney, P. Lepage, P. Mackenzie. 1994-12-06. QCD on Coarse Lattices. https://doi.org/10.1016/0920-5632(95)00382-j

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