Improved lattice operators: the case of the topological charge density

Details Improved lattice operators: the case of the topological charge density Improved lattice operators: the case of the topological charge density

1995-10-13

arxiv.org/abs/hep-lat/9510023v1

Phys.Rev. D53 (1996) 2619-2624

Physics

High Energy Physics

High Energy Physics - Lattice

11 pages (REVTEX) + 4 (uuencoded) figures

Scientific paper

10.1103/PhysRevD.53.2619

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 better statistical behavior as estimators of the topological charge density on the lattice, i.e. less noisy; (ii) a multiplicative renormalization much closer to one; (iii) a large suppression of the perturbative tail (and other unphysical mixings) in the corresponding lattice topological susceptibility.

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