Improved bilinears in lattice QCD with non-degenerate quarks
High Energy Physics - Lattice
2009-11-11 v3
Abstract
We describe the extension of the improvement program for bilinear operators composed of Wilson fermions to non-degenerate dynamical quarks. We consider two, three and four flavors, and both flavor non-singlet and singlet operators. We find that there are many more improvement coefficients than with degenerate quarks, but that, for three or four flavors, nearly all can be determined by enforcing vector and axial Ward identities. The situation is worse for two flavors, where many more coefficients remain undetermined.
Keywords
Cite
@article{arxiv.hep-lat/0511014,
title = {Improved bilinears in lattice QCD with non-degenerate quarks},
author = {Tanmoy Bhattacharya and Rajan Gupta and Weonjong Lee and Stephen R. Sharpe and Jackson M. S. Wu},
journal= {arXiv preprint arXiv:hep-lat/0511014},
year = {2009}
}
Comments
49 pages, no figures; minor improvements in wording, further typos corrected, published version