Tuning for three flavors of anisotropic clover fermions with stout-link smearing

Robert G. Edwards, Bálint Joó, Huey Wen Lin

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172 Scopus citations

Abstract

In this work we perform the parameter tuning of three flavors of dynamical clover quarks on anisotropic lattices. The fermion action uses three-dimensional spatial stout-link smearing. The gauge anisotropy is determined in a small box with Schrödinger background using Wilson-loop ratios. The fermion anisotropy is obtained from studying the meson dispersion relation with antiperiodic boundary conditions in the time direction. The spatial and temporal clover coefficients are fixed to the tree-level tadpole-improved values, and we demonstrate that they satisfy the nonperturbative conditions as determined by the Schrödinger-functional method. For the desired lattice spacing as≈0.12fm and renormalized anisotropy ξ=3.5, we find the gauge and fermionic anisotropies can be fixed to quark mass independent values up through the strange quark mass. This work lays the foundation needed for further studies of the excited-state hadron spectrum.

Original languageEnglish
Article number054501
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume78
Issue number5
DOIs
StatePublished - Sep 2 2008
Externally publishedYes

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