Tests of Large N(c) QCD from Hadronic tau Decay.
We use the ALEPH Collaboration data on vector and axial-vector spectral functions to test simple duality properties of QCD in the large N(c) 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 behaviors of specific correlation functions, which are order parameters of spontaneous chiral symmetry breaking, in a way that we find well supported by the data.
Peris
S
Grup de Física Teòrica and IFAE, Universitat Autònoma de Barcelona, E-08193 Barcelona, Spain.
Phily
B
de Rafael E