Are Topological Charge Fluctuations in QCD Instanton Dominated?

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We consider a recent proposal by Horvath et al. to address the question whether topological charge fluctuations in QCD are instanton dominated via the response of fermions using lattice fermions with exact chiral symmetry, the overlap fermions. Considering several volumes and lattice spacings we find strong evidence for chirality of a finite density of low-lying eigenvectors of the overlap-Dirac operator in the regions where these modes are peaked. This result suggests instanton dominance of topological charge fluctuations in quenched QCD.

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238 Kilobytes pages

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Edwards, Robert G. & Heller, Urs M. May 1, 2001.

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We consider a recent proposal by Horvath et al. to address the question whether topological charge fluctuations in QCD are instanton dominated via the response of fermions using lattice fermions with exact chiral symmetry, the overlap fermions. Considering several volumes and lattice spacings we find strong evidence for chirality of a finite density of low-lying eigenvectors of the overlap-Dirac operator in the regions where these modes are peaked. This result suggests instanton dominance of topological charge fluctuations in quenched QCD.

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238 Kilobytes pages

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  • Journal Name: submitted to Phys Rev; Journal Volume: D; Other Information: Submitted to Phys. Rev., Volume D

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  • Report No.: JLAB-THY-01-13
  • Report No.: DOE/ER/40150-1841
  • Report No.: hep-lat/0105004
  • Report No.: FSU-CSIT-01-24
  • Grant Number: AC05-84ER40150
  • Office of Scientific & Technical Information Report Number: 780797
  • Archival Resource Key: ark:/67531/metadc715980

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  • May 1, 2001

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  • Sept. 29, 2015, 5:31 a.m.

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  • Feb. 5, 2016, 7:50 p.m.

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Edwards, Robert G. & Heller, Urs M. Are Topological Charge Fluctuations in QCD Instanton Dominated?, article, May 1, 2001; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc715980/: accessed November 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.