Chiral symmetry and O(a) improvement in lattice QCD
High Energy Physics - Lattice
2009-10-28 v1
Abstract
The dominant cutoff effects in lattice QCD with Wilson quarks are proportional to the lattice spacing a. In particular, the isovector axial current satisfies the PCAC relation only up to such effects. Following a suggestion of Symanzik, they can be cancelled by adding local O(a) correction terms to the action and the axial current. We here address a number of theoretical issues in connection with the O(a) improvement of lattice QCD and then show that chiral symmetry can be used to fix the coefficients multiplying the correction terms.
Keywords
Cite
@article{arxiv.hep-lat/9605038,
title = {Chiral symmetry and O(a) improvement in lattice QCD},
author = {Martin Luescher and Stefan Sint and Rainer Sommer and Peter Weisz},
journal= {arXiv preprint arXiv:hep-lat/9605038},
year = {2009}
}
Comments
43 pages, uuencoded gzipped postscript file