Improved lattice operators: Case of the topological charge density
- 1 March 1996
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 53 (5) , 2619-2624
- https://doi.org/10.1103/physrevd.53.2619
Abstract
We analyze the properties of a class of improved lattice topological charge density operators, constructed by a smearinglike 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, and (iii) a large suppression of the perturbative tail (and other unphysical mixings) in the corresponding lattice topological susceptibility.Keywords
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