2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/178901The mass of the charm quark is analyzed in the context of QCD finite energy sum rules using recent BESII e+e- annihilation data and a large momentum expansion of the QCD correlator which incorporates terms to order (alpha_s)^2 (m_c^2/q^2)^6. Using various versions of duality, we obtain the consistent result m_c(m_c)=(1.37 +- 0.09)GeV. Our result is quite independent of the ones based on the inverse moment analysis.12 pages, 4 eps-figures, LaTeX, typos correctedHigh Energy Physics - Phenomenologytext