Unquenching effects on the coefficients of the Lüscher-Weisz action

Abstract

The effects of unquenching on the perturbative improvement coefficients in the Symanzik action are computed within the framework of Lüscher-Weisz on-shell improvement. We find that the effects of quark loops are surprisingly large, and their omission may well explain the scaling violations observed in some unquenched studies.

7 pages, 5 figures, uses revtex4; version to appear in Phys.Rev.D

References in corpus (1)

• Automatically generating Feynman rules for improved lattice field theories

Cited by in corpus (9)

• Scaling studies of QCD with the dynamical HISQ action
• The physics of eight flavours
• Bottomonium spectrum at order v^6 from domain-wall lattice QCD: precise results for hyperfine splittings
• Precise B, B_s and B_c meson spectroscopy from full lattice QCD
• Radiative corrections to the lattice gluon action for highly improved staggered quarks (HISQ) and the effect of such corrections on the static potential
• Neutral B-meson mixing from three-flavor lattice QCD: Determination of the SU(3)-breaking ratio ξ
• Perturbative determination of $c_{SW}$ for plaquette and Symanzik gauge action and stout link clover fermions
• Static Energy in ($2+1+1$)-Flavor Lattice QCD: Scale Setting and Charm Effects
• Lambda-parameter of lattice QCD with Symanzik improved gluon actions