On the scaling law of the SU(5) lattice gauge model with the mixed action

Creutz's Monte Carlo data of the string tension for SU(5) lattice gauge model is studied using the universality of the mixed action. For a certain negative r = βsub (A)/β, the scaling behavior, which is not seen for Wilson's action, seems to be present with the correlation length smaller than 3 lattice constant. This observation implies that, when the correlation length is a few lattice constant, the scaling behavior is very sensitive to the action type even in the class of the single-plaquette action. (author)