New lattice action for heavy quarks

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...

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Bibliographic Details
Published in:arXiv.org 2008-07
Main Authors: Oktay, Mehmet B, Kronfeld, Andreas S
Format: Article
Language:English
Subjects:
Couplings
Matching
Quantum chromodynamics
Quarks
Online Access:Get full text
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.0803.0523