A definition of the running coupling constant in a twisted SU(2) lattice gauge theory
G. M. de Divitiis, R. Frezzotti, M. Guagnelli, R. Petronzio
Abstract
We propose a definition of the running coupling constant in a SU(2) lattice gauge theory with twisted boundary conditions. It is based on the correlation of Polyakov loops extended in a twisted direction at a distance which is a fixed fraction of the totale lattice size. We make the perturbative calculation which connects this definition to standard regularization schemes. We find LambdaTwisted-Polyakov/LambdaMSbar = 1.6136(2).
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