One-loop matching of improved four-fermion staggered operators with an improved gluon action
High Energy Physics - Lattice
2011-05-19 v2 High Energy Physics - Phenomenology
Abstract
We present results for one-loop matching factors of four-fermion operators composed of HYP-smeared staggered fermions. We generalize previous calculations by using the tree-level improved Symanzik gauge action. These results are needed for our companion numerical calculation of and related matrix elements. We find that the impact on one-loop matching factors of using the improved gluon action is much smaller than that from the use of either HYP smearing or mean-field improvement. The one-loop coefficients for mean-field improved, HYP-smeared operators with the Symanzik gauge action have a maximum magnitude of , indicating that perturbation theory is reasonably convergent.
Keywords
Cite
@article{arxiv.1102.1774,
title = {One-loop matching of improved four-fermion staggered operators with an improved gluon action},
author = {Jongjeong Kim and Weonjong Lee and Stephen R. Sharpe},
journal= {arXiv preprint arXiv:1102.1774},
year = {2011}
}
Comments
11 pages, 16 figures, references are updated