Tests of large-Nc QCD from hadronic tau decay

Details Tests of large-Nc QCD from hadronic tau decay Tests of large-Nc QCD from hadronic tau decay

2000-07-28

arxiv.org/abs/hep-ph/0007338v1

Phys.Rev.Lett.86:14-17,2001

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.86.14

We use the Aleph data on vector and axial-vector spectral functions to test simple duality properties of QCD in the large Nc limit, which emerge in the approximation of a 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.

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