Progress in automated perturbation theory for heavy quark physics

We review our perturbative techniques for improved heavy quark actions. A new procedure for computing improvement coefficients is suggested, where the continuum limit of a lattice-regularized theory provides the matching conditions.We also use a gauge-invariant infrared regulator that is well suited...

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Bibliographic Details
Published in:arXiv.org 2003-09
Main Authors: Nobes, Matthew, Trottier, Howard
Format: Article
Language:English
Subjects:
Gauge theory
Mathematical analysis
Perturbation theory
Quarks
Systematic errors
Test procedures
Online Access:Get full text
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Summary:We review our perturbative techniques for improved heavy quark actions. A new procedure for computing improvement coefficients is suggested, where the continuum limit of a lattice-regularized theory provides the matching conditions.We also use a gauge-invariant infrared regulator that is well suited to higher-order calculations in lattice gauge theory. We report on preliminary tests of our method, as well as a possible way to reduce systematic errors in these calculations.
ISSN:2331-8422
DOI:10.48550/arxiv.0309086