V+A and V-A Correlators at Large NC: From OPE to Resonance Theory

Abstract

The spin-1 correlators are analysed in this talk through a large NC resonance theory. The matching to perturbative QCD and the first terms in the OPE constrains the hadronic parameters. A further sum-rule analysis shows the wider range of validity of the resonance description, which can help to discern the proper structure of the QCD mass spectrum.

Comments: 6 pages, 2 figures, proceedings of the talk given at HSQCD 2005, St. Petersburg, Russia, September 20-24 2005