2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/168505Vector Schwinger model with a mass term for the photon, describing 2D electrodyn amics with massless fermions, studied by us recently, represents a new class of models. This theory becomes gauge-invariant when studied on the light-front. Thi s is in contrast to the instant-form theory which is gauge-noninvariant. We quan tize this theory on the light-front.06pages, conferenceHigh Energy Physics - Theorytext