2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/197115We 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.4 pages, 2 figuresHigh Energy Physics - Phenomenologytext