Perturbatively improving renormalization constants

A. Schiller; G. Schierholz; H. Panagopoulos; H. Perlt; M. Constantinou; M. Costa; M. Gockeler; P. E. L. Rakow; R. Horsley

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arxiv 1310.6504 v1 pith:ZYZZUNDJ submitted 2013-10-24 hep-lat

M. Constantinou , M. Costa , M. Gockeler , R. Horsley , H. Panagopoulos , H. Perlt , P. E. L. Rakow , G. Schierholz

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A. Schiller

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keywords latticerenormalizationartifactscalculatedcarefulcomputedconstantscontinuum

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Renormalization factors relate the observables obtained on the lattice to their measured counterparts in the continuum in a suitable renormalization scheme. They have to be computed very precisely which requires a careful treatment of lattice artifacts. In this work we present a method to suppress these artifacts by subtracting one-loop contributions proportional to the square of the lattice spacing calculated in lattice perturbation theory.

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