Testing Unified Supersymmetric Models

Abstract

I define the Standard Supersymmetric Model (SSM) as the minimal supersymmetric extension ofthe Standard Model with gauge coupling unification and universal soft supersymmetry breaking at the unification scale. This well-defined model has a five-dimensional space of unknown parameters ($m_t, \tanβ, m_{1/2}, m_0, A$). I outline the top-down and bottom-up methods of solving this model. Thresholds may be treated either by dropping heavy particles from the RGE's or by considering loop corrections to the vacuum energy. Substantial regions of the parameter space are consistent with all experimental constraints. I consider the relation of the SSM to more realistic models such as supersymmetric $SU(5)$, Flipped $SU(5)\times U(1)$, the String-Inspired Standard Model, and string-derived models. I briefly discuss sparticle spectroscopy and flavor changing neutral currents (FCNC's) as sample methods for determining the unknown parameters of the SSM, and discriminating between the SSM and more realistic models.