2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/214273We improve the estimate of the axion CDM energy density by considering the new values of current quark masses, the QCD phase transition effect and a possible anharmonic effect.7 pages, 6 figures. References are added. A factor is correctedHigh Energy Physics - PhenomenologyAstrophysicstext