One-loop lattice artifacts of a dynamical charm quark

Abstract

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 Schrodinger functional and a related quantity, {\bar \upsilon}, 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.

18 pages, 7 figures

References in corpus (7)

• Light hadrons from lattice QCD with light (u,d), strange and charm dynamical quarks
• Scaling studies of QCD with the dynamical HISQ action
• The running coupling of QCD with four flavors
• Introduction to Non-perturbative Heavy Quark Effective Theory
• Perturbative Wilson loops with massive sea quarks on the lattice
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Cited by in corpus (5)

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• Nucleon form factors and moments of generalized parton distributions using $N_f=2+1+1$ twisted mass fermions
• Neutron electric dipole moment using $N_f=2+1+1$ twisted mass fermions
• A massive momentum-subtraction scheme
• Charm quark effects on the strong coupling extracted from the static force