Evidence Against Instanton Dominance of Topological Charge Fluctuations in QCD

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The low-lying eigenmodes of the Dirac operator associated with typical gauge field configurations in QCD encode, among other low-energy properties, the physics behind the solution to the U{sub A}(1) problem (i.e. the origin of the {eta}{prime} mass), the nature of spontaneous chiral symmetry breaking, and the physics of string-breaking, quark-antiquark pair production, and the OZI rule. Moreover, the space-time chiral structure of these eigenmodes reflects the space-time topological structure of the underlying gauge field. We present evidence from lattice QCD on the local chiral structure of low Dirac eigenmodes leading to the conclusion that topological charge fluctuations of the QCD ... continued below

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page(s) 251 KILOBYTES

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Horvath, Ivan; Isgur, Nathan; McCune, John & Thacker, H. B. February 7, 2001.

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The low-lying eigenmodes of the Dirac operator associated with typical gauge field configurations in QCD encode, among other low-energy properties, the physics behind the solution to the U{sub A}(1) problem (i.e. the origin of the {eta}{prime} mass), the nature of spontaneous chiral symmetry breaking, and the physics of string-breaking, quark-antiquark pair production, and the OZI rule. Moreover, the space-time chiral structure of these eigenmodes reflects the space-time topological structure of the underlying gauge field. We present evidence from lattice QCD on the local chiral structure of low Dirac eigenmodes leading to the conclusion that topological charge fluctuations of the QCD vacuum are not instanton-dominated. The result supports Witten's arguments that topological charge is produced by confinement-related gauge fluctuations rather than instantons.

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page(s) 251 KILOBYTES

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  • Journal Name: Physical Review; Journal Volume: D; Journal Issue: 65; Other Information: No journal information given for this preprint; PBD: 7 Feb 2001

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  • Report No.: JLAB-THY-01-05
  • Report No.: DOE/ER/40150-1809
  • Report No.: hep-lat/0102003
  • Grant Number: AC05-84ER40150
  • Office of Scientific & Technical Information Report Number: 775027
  • Archival Resource Key: ark:/67531/metadc724543

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  • February 7, 2001

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  • Sept. 29, 2015, 5:31 a.m.

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  • Feb. 5, 2016, 9:28 p.m.

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Horvath, Ivan; Isgur, Nathan; McCune, John & Thacker, H. B. Evidence Against Instanton Dominance of Topological Charge Fluctuations in QCD, article, February 7, 2001; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc724543/: accessed April 26, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.