Improving the topological charge density operator on the lattice

Details Improving the topological charge density operator on the lattice Improving the topological charge density operator on the lattice

1995-09-13

arxiv.org/abs/hep-lat/9509035v1

Nucl.Phys.Proc.Suppl. 47 (1996) 266-269

Physics

High Energy Physics

High Energy Physics - Lattice

4 pages, to be published in the Proceedings of Lattice 95, uuencoded postscript file

Scientific paper

10.1016/0920-5632(96)00053-9

We analyze the properties of a class of improved lattice topological charge density operators, constructed by a smearing-like procedure. By optimizing the choice of the parameters introduced in their definition, we find operators having (i) a much better statistical behavior as estimators of the topological charge density on the lattice, i.e. much less noisy; (ii) a multiplicative renormalization much closer to one; (iii) a large suppression of the perturbative tail in the corresponding lattice topological susceptibility.

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