Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
1994-07-15
Nucl.Phys. B435 (1995) 311-338
Physics
High Energy Physics
High Energy Physics - Lattice
35 pages, preprint numbers FSU-SCRI-94-71 and HU Berlin-IEP-94/10
Scientific paper
10.1016/0550-3213(94)00492-W
We investigate universality, scaling, the beta-function and the topological charge in the positive plaquette model for SU(2) lattice gauge theory. Comparing physical quantities, like the critical temperature, the string tension, glueball masses, and their ratios, we explore the effect of a complete suppression of a certain lattice artifact, namely the negative plaquettes, for SU(2) lattice gauge theory. Our result is that this modification does not change the continuum limit, i.e., the universality class. The positive plaquette model and the standard Wilson formulation describe the same physical situation. The approach to the continuum limit given by the beta-function in terms of the bare lattice coupling, however, is rather different: the beta-function of the positive plaquette model does not show a dip like the model with standard Wilson action.
Fingberg Jochen
Heller Urs M.
Mitrjushkin V.
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