Improvement of the Staggered Fermion Operators

Details Improvement of the Staggered Fermion Operators Improvement of the Staggered Fermion Operators

1996-04-30

arxiv.org/abs/hep-lat/9604025v1

Phys.Rev. D55 (1997) 353-361

Physics

High Energy Physics

High Energy Physics - Lattice

16 pages, latex, 1 figure

Scientific paper

10.1103/PhysRevD.55.353

We present a complete and detailed derivation of the finite lattice spacing corrections to staggered fermion matrix elements. Expanding upon arguments of Sharpe, we explicitly implement the Symanzik improvement program demonstrating the absence of order $a$ terms in the Symanzik improved action. We propose a general program to improve fermion operators to remove $O(a)$ corrections from their matrix elements, and demonstrate this program for the examples of matrix elements of fermion bilinears and $B_K$. We find the former does have $O(a)$ corrections while the latter does not.

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