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.

arXiv comment7 pages, 5 figures, uses revtex4; version to appear in Phys.Rev.D

References in corpus (13)

• High-Precision Lattice QCD Confronts Experiment
• Light pseudoscalar decay constants, quark masses, and low energy constants from three-flavor lattice QCD
• Variants of fattening and flavor symmetry restoration
• Flavor-Symmetry Restoration and Symanzik Improvement for Staggered Quarks
• Lattice QCD on Small Computers
• Accurate Determinations of ${\alpha }_s$ from Realistic Lattice QCD
• High-precision determination of the light-quark masses from realistic lattice QCD
• Automatically generating Feynman rules for improved lattice field theories
• Higher-order perturbation theory for highly-improved actions
• Second Order Perturbation Theory for Improved Gluon and Staggered Quark Actions
• Computation of the one-loop Symanzik coefficients for the square action
• Lattice perturbation theory for gluonic and fermionic actions
• Progress in automated perturbation theory for heavy quark physics

Cited by in corpus (19)

• Full nonperturbative QCD simulations with 2+1 flavors of improved staggered quarks
• Lattice QCD ensembles with four flavors of highly improved staggered quarks
• B- and D-meson decay constants from three-flavor lattice QCD
• Scaling studies of QCD with the dynamical HISQ action
• The Upsilon spectrum and the determination of the lattice spacing from lattice QCD including charm quarks in the sea
• The physics of eight flavours
• Update of $|V_{cb}|$ from the $\bar{B}\to D^{\ast }\ell \bar{\nu }$ form factor at zero recoil with three-flavor lattice QCD
• $B\to K{l}^{+}{l}^{-}$ decay form factors from three-flavor lattice QCD
• Quarkonium mass splittings in three-flavor lattice QCD
• 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
• Large-order NSPT for lattice gauge theories with fermions: the plaquette in massless QCD
• Static Energy in ($2+1+1$)-Flavor Lattice QCD: Scale Setting and Charm Effects
• Lambda-parameter of lattice QCD with Symanzik improved gluon actions
• Nature of the chiral phase transition of two flavour QCD from imaginary chemical potential with HISQ fermions
• The b quark mass from lattice nonrelativistic QCD