2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/198688We derive an estimate for the ratio of the rho mass and the pion decay constant from an analysis of vector and axial-vector two-point functions using large-Nc, lowest-meson dominance and the operator product expansion, in the chiral limit. We discuss the extension of this analysis to the scalar and pseudoscalar sector. Furthermore, this leads to a successful parameter-free determination of the L_i couplings of the chiral Lagrangian if an improved Nambu-Jona-Lasinio ansatz for Green functions is assumed at low energies.7 pages, 1 figure. Numerical error in scalar sector corrected; main results unchangedHigh Energy Physics - PhenomenologyNuclear Theorytext