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Perturbative Subtraction Methods

Walter Wilcox

hep-latarXiv:hep-lat/9908001

Abstract

The effects of an automated, tenth order in κ 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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