One-loop matching coefficients for improved staggered bilinears

Details One-loop matching coefficients for improved staggered bilinears One-loop matching coefficients for improved staggered bilinears

2002-08-13

arxiv.org/abs/hep-lat/0208018v3

Phys.Rev. D66 (2002) 114501

Physics

High Energy Physics

High Energy Physics - Lattice

13 pages, 1 figure (misleading sentence in sec. II removed; version to appear in Physical Review D)

Scientific paper

10.1103/PhysRevD.66.114501

We calculate one-loop matching factors for bilinear operators composed of improved staggered fermions. We compare the results for different improvement schemes used in the recent literature, all of which involve the use of smeared links. These schemes aim to reduce, though not completely eliminate, O(a^2) discretization errors. We find that all these improvement schemes substantially reduce the size of matching factors compared to unimproved staggered fermions. The resulting corrections are comparable to, or smaller than, those found with Wilson and domain-wall fermions. In the best case (``Fat-7'' and mean-field improved HYP links) the corrections are 10 % or smaller at 1/a = 2 GeV.

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