arXiv:hep-lat/0409149·v1·High Energy Physics — Lattice
Two and three loops computations of renormalization constants for lattice QCD
F. Di Renzo🇮🇹 · A. Mantovi🇮🇹 · V. Miccio🇮🇹 · L. Scorzato🇩🇪 · C. Torrero🇮🇹
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.
Comments: Lattice2004(improv), 3 pages, 4 figures