2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/54950Using deformation theory based on BRST cohomology, a supergravity model is constructed which interpolates through a continuous deformation parameter between new minimal supergravity with an extra U(1) gauge multiplet and standard supergravity with local R-symmetry in a formulation with a nonstandard set of auxiliary fields. The deformation implements an electromagnetic duality relating the extra U(1) to the R-symmetry. A consistent representative of the R-anomaly in the model is proposed too.19 pages, latex2.09 (works also with latex2e), no figuresHigh Energy Physics - Theorytext