One-loop matching factors for staggered bilinear operators with improved gauge actions

Abstract

We present results for one-loop perturbative matching factors using bilinear operators composed of improved staggered fermions, using unimproved (Wilson) and improved (Symanzik, Iwasaki, and DBW2) gluon actions. We consider two fermions actions---HYP/$\overline{\text{Fat7}}$-smeared and "asqtad". The former is being used in calculations of electroweak matrix elements, while the latter have been used extensively by the MILC collaboration. We observe that using the improved gluon action leads to small reductions in the perturbative corrections, but that these reductions are smaller than those obtained when moving from the tadpole-improved naive staggered action to either HYP-smeared or asqtad action.

11 pages, 5 figures, corrected typos, published in PRD

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Cited by in corpus (7)

• Nonperturbative comparison of clover and HISQ quarks in lattice QCD and the properties of the phi meson
• Non-perturbative Renormalization for Improved Staggered Bilinears
• One-loop matching of improved four-fermion staggered operators with an improved gluon action
• Perturbative renormalization functions of local operators for staggered fermions with stout improvement
• Toolkit for staggered $\Delta S=2$ matrix elements
• Chiral symmetry and taste symmetry from the eigenvalue spectrum of staggered Dirac operators
• One loop matching factors for improved staggered four-fermion operators with improved glue