Abstract
In this paper, we discuss the issues of supersymmetry breaking and moduli stabilization within the context of ${E}_{8}\ensuremath{\bigotimes}{E}_{8}$ heterotic orbifold constructions and, in particular, we focus on the class of ``mini-landscape'' models. In the supersymmetric limit, these models admit an effective low-energy field theory with a spectrum of states and dimensionless gauge and Yukawa couplings very much like that of the minimal supersymmetric standard model. These theories contain a non-Abelian hidden gauge sector which generates a nonperturbative superpotential leading to supersymmetry breaking and moduli stabilization. We demonstrate this effect in a simple model which contains many of the features of the more general construction. In addition, we argue that once supersymmetry is broken in a restricted sector of the theory, then all moduli are stabilized by supergravity effects. Finally, we obtain the low-energy superparticle spectrum resulting from this simple model.
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