Topological charge correlators, spectral bounds, and contact terms

2002/09/06 by H. B. Thacker, H. Thacker, S. J. Dong +10 · 1 citation
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions #Quantum and electron transport phenomena #hep-lat

paper · pdf · doi:10.1016/s0920-5632(03)01665-7

published as Nucl.Phys.Proc.Suppl.119:685-687,2003 · Lattice 2002 Conference Proceedings

arxiv created 2002/09/06 · openalex publication_date 2003/05/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The structure of topological charge fluctuations in the QCD vacuum is strongly restricted by the spectral negativity of the Euclidean 2-point correlator for x≠ 0 and the presence of a positive contact term. Some examples are considered which illustrate the physical origin of these properties.

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• The negativity of the overlap-based topological charge density correlator in pure-glue QCD and the non-integrable nature of its contact part