Instantons and the large Nc limit, A.D. 2004
Abstract
We review our current understanding of instanton effects in the large Nc limit of QCD. We argue that the instanton liquid can have a smooth large Nc 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.
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