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

Journal Article · Tue Jun 01 04:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.114503· OSTI ID:21407987

Kim, Jongjeong; Lee, Weonjong ^[1]; Sharpe, Stephen R ^[2]

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1. Lattice Gauge Theory Research Center and Frontier Physics Research Division, Department of Physics and Astronomy, Seoul National University, Seoul, 151-747 (Korea, Republic of)
2. Physics Department, Box 351560, University of Washington, Seattle, Washington 98195-1560 (United States)

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/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.

• OSTI ID: 21407987
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 11 Vol. 81; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
CORRECTIONS
FERMIONS
GLUONS
MATRIX ELEMENTS
PERTURBATION THEORY