2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/53819We give an example of topological theory whose Hilbert space contains physical objects: the N=2 supersymmetric Lagrangian of spin-one particles moving in D-dimensional space-time equals the Lagrangian of a topological sigma model in a (D+2)-dimensional target. The equivalence is valid for a curved space-time. As an application, we calculate the deviation of spin-one particles in a Schwarzschild background (gravitational Stern-Gerlach effect).19 pages. PAR LPTHE 94-05High Energy Physics - Theorytext