2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/53983New kinds of supersymmetry arise in supersymmetric $\sg$-models describing the motion of spinning point-particles in classical backgrounds, for example black-holes, or the dynamics of monopoles. Their geometric origin is the existence of Killing-Yano tensors. The relation between these concepts is explained and examples are given. --- Contribution to Proceedings Quarks-94; Vladimir, Russia (1994).12 pages, NIKHEF-H/94-29High Energy Physics - Theorytext