New lattice action for heavy quarks
High Energy Physics - Lattice
2008-12-18 v2
Abstract
We extend the Fermilab method for heavy quarks to include interactions of dimensions 6 and 7 in the action. There are, in general, many new interactions, but we carry out the calculations needed to match the lattice action to continuum QCD at the tree level, finding six non-zero couplings. Using the heavy-quark theory of cutoff effects, we estimate how large the remaining discretization errors are. We find that our tree-level matching, augmented with one-loop matching of the dimension-five interactions, can bring these errors below 1%, at currently available lattice spacings.
Keywords
Cite
@article{arxiv.0803.0523,
title = {New lattice action for heavy quarks},
author = {Mehmet B. Oktay and Andreas S. Kronfeld},
journal= {arXiv preprint arXiv:0803.0523},
year = {2008}
}
Comments
43 pp; v2 conforms with PRD version, improving plots and many minor things