2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/43214A correction of the low energy theorem of the γ\to3πanomaly has been found. A_{3π}(0,0,0) and the cross section are calculated. Theory agrees with data. There is no new adjustable parameter.14 pagesHigh Energy Physics - Phenomenologytext