2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/47177The order - αradiative corrections to the differential decay rate of polarized orthopositronium are obtained. Their influences on the three photons coincidence rate as a function of positronium polarization is considered.7 pages, 1 Postscript figure, REVTeX3High Energy Physics - Phenomenologytext