One-loop lattice artifacts of a dynamical charm quark

For a few observables in O(a) improved lattice QCD, we compute discretization effects arising from the vacuum polarization of a heavy quark at one-loop order. In particular, the force between static quarks, the running coupling in the Schrödinger functional and a related quantity, v¯ , are considered. Results show that the cutoff effects of a dynamical charm quark are typically smaller than those present in the pure gauge theory. This perturbative result is a good indication that dynamical charm quarks are feasible already now.

Note:

18 pages, 7 figures

12.38.Gc
14.65.Dw
12.38.Bx
11.10.Gh
Lattice QCD
Charm quarks
Cutoff effects
Lattice perturbation theory
quark: static
effect: discrete

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