The role of instantons in quantum chromodynamics. (I). Physical vacuum

E. V. Shuryak

doi:10.1016/0550-3213(82)90478-3

The role of instantons in quantum chromodynamics. (I). Physical vacuum

E. V. Shuryak

Physics and Astronomy

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528 Scopus citations

Abstract

We argue that the physical QCD vacuum is similar to the "instanton liquid" with density dn/dρ{variant} = n_c(gd(ρ{variant}-ρ{variant}_c), where n_c {reversed tilde equals} 8 · 10^-4 GeV⁴ and ρ{variant}_c {reversed tilde equals} 1 600GeV. Instantons occupy only about 1 20th of space-time, which can be traced to the presence of several light quark flavours. Several predictions of the vacuum properties (e.g. 〈ψψ〉 {reversed tilde equals} - 1 · 10^-2 GeV³) are in agreement with phenomenology.

Original language	English
Pages (from-to)	93-115
Number of pages	23
Journal	Nuclear Physics, Section B
Volume	203
Issue number	1
DOIs	https://doi.org/10.1016/0550-3213(82)90478-3
State	Published - Aug 9 1982

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AB - We argue that the physical QCD vacuum is similar to the "instanton liquid" with density dn/dρ{variant} = nc(gd(ρ{variant}-ρ{variant}c), where nc {reversed tilde equals} 8 · 10-4 GeV4 and ρ{variant}c {reversed tilde equals} 1 600GeV. Instantons occupy only about 1 20th of space-time, which can be traced to the presence of several light quark flavours. Several predictions of the vacuum properties (e.g. 〈ψψ〉 {reversed tilde equals} - 1 · 10-2 GeV3) are in agreement with phenomenology.

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The role of instantons in quantum chromodynamics. (I). Physical vacuum

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