Improving the signal-to-noise-ratio in lattice gauge theories

Details Improving the signal-to-noise-ratio in lattice gauge theories Improving the signal-to-noise-ratio in lattice gauge theories

1997-04-28

arxiv.org/abs/hep-lat/9704017v1

Phys.Rev. D56 (1997) 6798-6803

Physics

High Energy Physics

High Energy Physics - Lattice

11 pages, LaTeX, 3 figures using epsf

Scientific paper

10.1103/PhysRevD.56.6798

Renormalization of composite fields is employed to suppress the statistical noise in lattice gauge calculations. We propose a new action which differs from the standard Wilson action by ''irrelevant'' operators, but suppresses the fluctuations of the plaquette. We numerically study the Creutz ratios and find a scaling window. The SU(2) mass gap is estimated. We prove that the contributions of the ''irrelevant'' operators to the screening mass decrease towards the continuum limit. The results obtained from the action with noise suppression are compared with those of the standard Wilson action.

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