V+A and V-A Correlators at Large NC: From OPE to Resonance Theory
  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. 
J. J. Sanz-Cillero