2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/39420Self-energy corrections of order O(alpha^2) to the parapositronium and orthopositronium decay rates are calculated. Numerical values of the corresponding coefficients are B_p=-3.74, B_o=2.02.8 pages, LaTEX, 2 figures, uses linedraw.styHigh Energy Physics - PhenomenologySelf-energy O(alpha^2) correction to the positronium decay ratetext