We develop an improved lattice action for heavy quarks based on Brillouin-type fermions, that have excellent energy-momentum dispersion relation. The leading discretization errors of O(a) and O(a2) are eliminated at tree-level. We carry out a scaling study of this improved Brillouin fermion action on quenched lattices by calculating the charmonium energy-momentum dispersion relation and hyperfine splitting. We present a comparison to standard Wilson fermions and domain-wall fermions.
@article{arxiv.1504.01630,
title = {Improved lattice fermion action for heavy quarks},
author = {Yong-Gwi Cho and Shoji Hashimoto and Andreas Jüttner and Takashi Kaneko and Marina Marinkovic and Jun-Ichi Noaki and Justus Tobias Tsang},
journal= {arXiv preprint arXiv:1504.01630},
year = {2015}
}
Comments
33 pages, 23 figures, minor changes are made, a version published in JHEP