Perturbative Subtraction Methods
classification
✦ hep-lat
keywords
reductionsubtractionvarianceautomatedcurrentsdisconnecteddramaticeffects
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The effects of an automated, tenth order in $\kappa$ subtraction scheme on the noise variance of various Wilson QCD disconnected matrix elements are examined. It is found that there is a dramatic reduction in the variance of the lattice point-split electromagnetic currents and that this reduction persists at small quark mass.
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