Constraining Quark-Hadron Duality at Large-Nc

Abstract

Quark-meson duality for two-point functions of vector and axial-vector QCD currents is investigated in the large-Nc approximation. We find that the joint constraints of duality and chiral symmetry imply degeneracy of excited vector and axial-vector mesons in the large-Nc limit. We compare model-independent constraints with expectations based on the Veneziano-Lovelace-Shapiro string model. Several models of duality are constructed, and phenomenological implications are discussed.

16 pages TeX, uses mtexsis.tex

References in corpus (2)

• Large-Nc QCD meets Regge theory: the example of spin-one two-point functions
• Quark-Hadron Duality in Structure Functions

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