  We study the contributions of physics beyond the standard model to the
short-distance s->d gamma transition in Omega^- -> Cascade^- gamma decay. We
explore the possibility that the new interactions remove the chirality
suppression which occurs in the standard-model contribution to s->d gamma and
enhance the effect of this coupling by factors of a heavy-mass scale relative
to the s-quark mass. We consider two of the popular models for new physics,
and, after taking into account constraints from other processes, find that
their contributions can be larger than that of the standard model by up to a
few times, which suggests that the yet unobserved Omega^- -> Cascade^- gamma
decay is a likely probe for new physics.
