2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/45123Relativistic corrections to the positronium decay rate are calculated. They are close to $40(α/π)^2$ and $46(α/π)^2$ for singlet and triplet states respectively.8 pages, LATEX, BINP 94-30High Energy Physics - Phenomenologytext