Resolving Exceptional Configurations
classification
✦ hep-lat
keywords
artifactsconfigurationsexceptionallatticeapproximationarisecontinuumcorrect
read the original abstract
In lattice QCD with Wilson fermions, exceptional configurations arise in the quenched approximation at small quark mass. The origin of these large previously uncontrolled lattice artifacts is identified. A simple well-defined procedure (MQA) is presented which removes the artifacts while preserving the correct continuum limit.
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