Improved lattice fermion action for heavy quarks
arXiv:1504.01630 · doi:10.1007/JHEP05(2015)072
Abstract
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 $O(a^2)$ 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.
33 pages, 23 figures, minor changes are made, a version published in JHEP