The QCD vacuum as an instanton liquid

E. Shuryak; T. Schäfer

doi:10.1146/annurev.nucl.47.1.359

The QCD vacuum as an instanton liquid

E. Shuryak
, T. Schäfer

Physics and Astronomy

Stony Brook University

University of Washington

Research output: Contribution to journal › Review article › peer-review

39 Scopus citations

Abstract

We review recent progress in understanding the importance of instanton effects in QCD. Instantons provide a mechanism for quark and gluon condensation, explain the U(1)_A anomaly and the appearance of a non-perturbative vacuum energy density. In the framework of the instanton liquid model, a large number of hadronic correlation functions were calculated. The results are in good agreement with both experimental data and lattice simulations. We also review recent results on the phase structure of QCD-like theories. Instantons provide a mechanism for chiral symmetry restoration at finite temperature (or for a large number of quark flavors) connected with the formation of instanton-anti-instanton molecules.

Original language	English
Pages (from-to)	359-394
Number of pages	36
Journal	Annual Review of Nuclear and Particle Science
Volume	47
Issue number	1
DOIs	https://doi.org/10.1146/annurev.nucl.47.1.359
State	Published - 1997

Keywords

Chiral symmetry
Hadronic structure
QCD at finite temperature
QCD correlation functions
QCD phase transitions

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10.1146/annurev.nucl.47.1.359

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abstract = "We review recent progress in understanding the importance of instanton effects in QCD. Instantons provide a mechanism for quark and gluon condensation, explain the U(1)A anomaly and the appearance of a non-perturbative vacuum energy density. In the framework of the instanton liquid model, a large number of hadronic correlation functions were calculated. The results are in good agreement with both experimental data and lattice simulations. We also review recent results on the phase structure of QCD-like theories. Instantons provide a mechanism for chiral symmetry restoration at finite temperature (or for a large number of quark flavors) connected with the formation of instanton-anti-instanton molecules.",

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T1 - The QCD vacuum as an instanton liquid

AU - Shuryak, E.

AU - Schäfer, T.

PY - 1997

Y1 - 1997

N2 - We review recent progress in understanding the importance of instanton effects in QCD. Instantons provide a mechanism for quark and gluon condensation, explain the U(1)A anomaly and the appearance of a non-perturbative vacuum energy density. In the framework of the instanton liquid model, a large number of hadronic correlation functions were calculated. The results are in good agreement with both experimental data and lattice simulations. We also review recent results on the phase structure of QCD-like theories. Instantons provide a mechanism for chiral symmetry restoration at finite temperature (or for a large number of quark flavors) connected with the formation of instanton-anti-instanton molecules.

AB - We review recent progress in understanding the importance of instanton effects in QCD. Instantons provide a mechanism for quark and gluon condensation, explain the U(1)A anomaly and the appearance of a non-perturbative vacuum energy density. In the framework of the instanton liquid model, a large number of hadronic correlation functions were calculated. The results are in good agreement with both experimental data and lattice simulations. We also review recent results on the phase structure of QCD-like theories. Instantons provide a mechanism for chiral symmetry restoration at finite temperature (or for a large number of quark flavors) connected with the formation of instanton-anti-instanton molecules.

KW - Chiral symmetry

KW - Hadronic structure

KW - QCD at finite temperature

KW - QCD correlation functions

KW - QCD phase transitions

UR - https://www.scopus.com/pages/publications/0031283845

U2 - 10.1146/annurev.nucl.47.1.359

DO - 10.1146/annurev.nucl.47.1.359

M3 - Review article

SN - 0163-8998

VL - 47

SP - 359

EP - 394

JO - Annual Review of Nuclear and Particle Science

JF - Annual Review of Nuclear and Particle Science

IS - 1

ER -

The QCD vacuum as an instanton liquid

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Keywords

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