Instantons in QCD
Abstract
The authors review the theory and phenomenology of instantons in quantum chromodynamics (QCD). After a general overview, they provide a pedagogical introduction to semiclassical methods in quantum mechanics and field theory. The main part of the review summarizes our understanding of the instanton liquid in QCD and the role of instantons in generating the spectrum of light hadrons. The authors also discuss properties of instantons at finite temperature and how instantons can provide a mechanism for the chiral phase transition. They give an overview of the role of instantons in some other models, in particular lowdimensional sigma models, electroweak theory, and supersymmetric QCD.
 Publication:

Reviews of Modern Physics
 Pub Date:
 April 1998
 DOI:
 10.1103/RevModPhys.70.323
 arXiv:
 arXiv:hepph/9610451
 Bibcode:
 1998RvMP...70..323S
 Keywords:

 12.38.Lg;
 11.10.Lm;
 11.15.Kc;
 12.60.Jv;
 Other nonperturbative calculations;
 Nonlinear or nonlocal theories and models;
 Classical and semiclassical techniques;
 Supersymmetric models;
 High Energy Physics  Phenomenology;
 High Energy Physics  Lattice;
 High Energy Physics  Theory;
 Nuclear Theory
 EPrint:
 143 pages, latex (uses rmp.sty, harvard.sty, epsf.sty), 42 figures, to appear in Rev. Mod. Phys