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Constraining Quark-Hadron Duality at Large-Nc

S. R. Beane
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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.

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S. R. Beane. 2001-06-01. Constraining Quark-Hadron Duality at Large-Nc. https://doi.org/10.1103/physrevd.64.116010

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