Perturbatively improving regularization-invariant momentum scheme renormalization constants
Date
2013Author
Constantinou, Martha G.Costa, M. G.
Göckeler, M.
Horsley, R.
Panagopoulos, Haralambos G.
Perlt, H.
Rakow, P. E. L.
Schierholz, G.
Schiller, A.
ISSN
1550-7998Source
Physical Review D - Particles, Fields, Gravitation and CosmologyVolume
87Issue
9Google Scholar check
Metadata
Show full item recordAbstract
The determination of renormalization factors is of crucial importance in lattice QCD. They relate the observables obtained on the lattice to their measured counterparts in the continuum in a suitable renormalization scheme. Therefore, they have to be computed as precisely as possible. A widely used approach is the nonperturbative Rome-Southampton method. It requires, however, a careful treatment of lattice artifacts. In this paper we investigate a method to suppress these artifacts by subtracting one-loop contributions to renormalization factors calculated in lattice perturbation theory. We compare results obtained from a complete one-loop subtraction with those calculated for a subtraction of contributions proportional to the square of the lattice spacing. © 2013 American Physical Society.