@MISC{Falk99cosmologicalconstraints, author = {Toby Falk}, title = {Cosmological Constraints on the MSSM}, year = {1999} }

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Abstract

Introduction The title of this talk is rather broad. Specifically what I will be talking about today is relic density constraints on supersymmetric models, and I will focus in particular on bounds on minimal Supergravity (mSUGRA). I'll begin with a brief reminder of the notation of supersymmetry, then give an introduction to relic densities, how they are computed, and how we can use them to constrain models of low-energy supersymmetry. I'll then discuss coannihilation in general and show how it dramatically relaxes the cosmological upper bound on the mSUGRA masses. Finally, I'll give an example of constraints (on CP violating phases in mSUGRA) which are not relaxed by the weakened mass limits. 2. SUSY Since previous speakers have introduced the Supersymmetric Standard Model, I will give only a brief reminder, in order to present the particle content and parameters and to set the notation. Recall that SUSY essentially doubles the particle conte