Instantons as a bridge between weak and strong coupling in quantum chromodynamics

Curtis Gove Callan, Roger F. Dashen, David J. Gross

Research output: Contribution to journalArticle

89 Scopus citations

Abstract

The transition from weak to strong coupling in quantum chromodynamics is discussed using semiclassical methods to calculate the effective coupling g(a) of an effective lattice theory as a function of a. We demonstrate that the renormalization effects due to instantons cause a sharp transition from weak to strong coupling in the range g(a)1.5-3. This is verified by showing that the "string tension" as well as the function calculated by semiclassical methods match their strong-coupling behavior for g1.5-3. An independent test of this notion is provided by a bag-model calculation of the string tension.

Original languageEnglish (US)
Pages (from-to)3279-3291
Number of pages13
JournalPhysical Review D
Volume20
Issue number12
DOIs
StatePublished - Jan 1 1979

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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