Instantons in non-perturbative QCD vacuum

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Abstract

The effects of large-scale vacuum fluctuations on instantons of a small size ρ{variant} are considered. We find the instanton density with account of the gluon vacuum condensate. It is shown that the instanton gas approximation fails at unexpectedly small ρ{variant}. The instanton interaction with the gluon condensate already becomes strong at ρ{variant} ≈ (1.1 GeV)-, while the absolute bound for the use of quasiclassical methods lies at ρ{variant} ≈ (0.5 GeV)-1.

Original languageEnglish (US)
Pages (from-to)45-54
Number of pages10
JournalNuclear Physics, Section B
Volume165
Issue number1
DOIs
StatePublished - Mar 17 1980

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