Improved Nonrelativistic QCD for Heavy Quark Physics

Details Improved Nonrelativistic QCD for Heavy Quark Physics Improved Nonrelativistic QCD for Heavy Quark Physics

1992-05-07

arxiv.org/abs/hep-lat/9205007v1

Phys.Rev.D46:4052-4067,1992

Physics

High Energy Physics

High Energy Physics - Lattice

40 pages, 2 figures (not included), in LaTeX

Scientific paper

10.1103/PhysRevD.46.4052

We construct an improved version of nonrelativistic QCD for use in lattice simulations of heavy quark physics, with the goal of reducing systematic errors from all sources to below 10\%. We develop power counting rules to assess the importance of the various operators in the action and compute all leading order corrections required by relativity and finite lattice spacing. We discuss radiative corrections to tree level coupling constants, presenting a procedure that effectively resums the largest such corrections to all orders in perturbation theory. Finally, we comment on the size of nonperturbative contributions to the coupling constants.

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