2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/97690Recent work on the use of dimensional reduction for the regularisation of non--supersymmetric theories is reviewed. It is then shown that there exists a class of theories for which a universal form of the soft supersymmetry breaking terms is invariant under renormalisation. It is argued that this universal form might be approached as an infra--red fixed point for the unified theory above the unification scale. The superparticle spectrum is calculated for these theories.9 pages. Uses latex and psfig. One figure in a separate postscript fileHigh Energy Physics - Phenomenologytext