Two and three loops computations of renormalization constants for lattice QCD
arXiv:hep-lat/0409149 · doi:10.1016/j.nuclphysbps.2004.11.275
Abstract
Renormalization constants can be computed by means of Numerical Stochastic Perturbation Theory to two/three loops in lattice perturbation theory, both in the quenched approximation and in the full (unquenched) theory. As a case of study we report on the computation of renormalization constants of the propagator for Wilson fermions. We present our unquenched (N_f=2) computations and compare the results with non perturbative determinations.
Lattice2004(improv), 3 pages, 4 figures