Quark-Hadron Duality for Hybrid Mesons at Large-Nc

Abstract

We investigate implications of quark-hadron duality for hybrid mesons in the large-Nc limit. A simple formalism is developed which implements duality for QCD two-point functions of currents of quark bilinears, with any number of gluons. We argue that the large-Nc meson masses share a common parameter, which is related to the QCD string tension. This parameter is fixed from correlators of conserved vector and axial-vector currents, and using lattice QCD determinations of the string tension. Our results predict towers of hybrid mesons which, within expected 1/Nc corrections, naturally accommodate the 1^(-+) experimental hybrid candidates.

13 pages TeX, uses mtexsis.tex, 4 eps figures

References in corpus (1)

• Large-Nc QCD meets Regge theory: the example of spin-one two-point functions

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