QCD on Coarse Lattices

Details QCD on Coarse Lattices QCD on Coarse Lattices

1994-12-06

arxiv.org/abs/hep-lat/9412035v1

Nucl.Phys.Proc.Suppl. 42 (1995) 787-789

Physics

High Energy Physics

High Energy Physics - Lattice

4 pages

Scientific paper

10.1016/0920-5632(95)00382-J

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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