Perturbatively improving renormalization constants

Authors :: Constantinou, M.
Costa, M.
Gockeler, M.
Horsley, R.
Panagopoulos, H.
Perlt, H.
Rakow, P. E. L.
Schierholz, G.
Schiller, A.
Publication Year :: 2013
Abstract: 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.<br />Comment: 7 pages, 2 figures, LATTICE 2013