2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/178730The Heidelberg-Moscow experiment gives the most stringent limit on the Majorana neutrino mass. After 24 kg yr of data with pulse shape measurements, we set a lower limit on the half-life of the neutrinoless double beta decay in 76Ge of T_1/2 > 5.7 * 10^{25} yr at 90% C.L., thus excluding an effective Majorana neutrino mass greater than 0.2 eV. This allows to set strong constraints on degenerate neutrino mass models.6 pages (latex) including 3 postscript figures and 2 tablesHigh Energy Physics - Experimenttext