Thomas Schaefer
Published 2004-12-15, updated 2005-03-11Version 2
We review our current understanding of instanton effects in the large N_c limit of QCD. We argue that the instanton liquid can have a smooth large N_c limit which is in agreement with scaling relations derived from Feynman diagrams. We also discuss certain limits of QCD, like the case of high baryon density, in which the Witten-Veneziano relation can be derived from QCD and is saturated by instantons.
Comments: 18 pages, to appear in the proceedings of the workshop on ``Large N QCD'', ECT* Trento (Italy), 2004; v2 references added
QCD at high Baryon Density and Temperature: Competing Condensates and the Tricritical Point
The Transition Temperature to the Superconducting Phase of QCD at High Baryon Density
Progress in Evaluating Some Complicated Types of Feynman Diagrams with Two (and More) Loops
