Renormalization and topological susceptibility on the lattice: SU(2) Yang-Mills theory

Abstract

The renormalization functions involved in the determination of the topological susceptibility in the SU(2) lattice gauge theory are extracted by direct measurements, without relying on perturbation theory. The determination exploits the phenomenon of critical slowing down to allow the separation of perturbative and nonperturbative effects. The results are in good agreement with perturbative computations.