Minimal Hadronic Ansatz to Large-Nc QCD and Hadronic tau Decay

Abstract

I report on some recent work done in collaboration with Santi Peris and Boris Phily (hep-ph/0007338) where, using the Aleph data on vector and axial-vector spectral functions, we test simple duality properties of QCD in the large-Nc limit which emerge in the approximation of a {\it minimal hadronic ansatz} of a spectrum of narrow states. These duality properties relate the short- and long-distance behaviours of specific correlation functions, which are order parameters of spontaneous chiral symmetry breaking, in a way that we find well supported by the data.

7 pages with 3 figures. Latex file. Contribution to the Euroconference QCD00, Montpellier, France

References in corpus (3)

• Decay of pseudoscalars into lepton pairs and large-Nc QCD
• K0-anti-K0 mixing in the 1/Nc expansion
• A New Approach to Weak Amplitudes in Large-Nc QCD

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• Summary on m_{c,b}(m_{c,b}) and precise f_{D_(s),B_(s)} from heavy-light QCD spectral sum rules
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