2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/197233The process gamma* gamma -> sigma is investigated in the framework of the SU(2)xSU(2) chiral NJL model. The form factor of the process is derived for arbitrary virtuality of gamma* in the Euclidean kinematic domain. The asymptotic behaviour of this form factor resembles the asymptotic behaviour of the gamma* gamma -> pi form factor.11 pages, 2 figures; added referencesHigh Energy Physics - Phenomenologytext