Instanton dominance of topological charge fluctuations in QCD?

Details Instanton dominance of topological charge fluctuations in QCD? Instanton dominance of topological charge fluctuations in QCD?

2001-05-02

arxiv.org/abs/hep-lat/0105001v1

Phys.Rev. D65 (2002) 014506

Physics

High Energy Physics

High Energy Physics - Lattice

10 pages, 6 figures

Scientific paper

10.1103/PhysRevD.65.014506

We consider the local chirality of near-zero eigenvectors from Wilson-Dirac and clover improved Wilson-Dirac lattice operators as proposed recently by Horv\'ath et al. We studied finer lattices and repaired for the loss of orthogonality due to the non-normality of the Wilson-Dirac matrix. As a result we do see a clear double peak structure on lattices with resolutions higher than 0.1 fm. We found that the lattice artifacts can be considerably reduced by exploiting the biorthogonal system of left and right eigenvectors. We conclude that the dominance of instantons on topological charge fluctuations is not ruled out by local chirality measurements.

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