Cosmological Constraints on the MSSM

Abstract

I discuss recent developments in the study of cosmological limits on the Minimal Supersymmetric Standard Model (MSSM). In particular, I focus on the effect of neutralino-stau coannihilation on the relic abundance of neutralinos, and I give examples where the cosmologically derived limits on the supersymmetric parameters are relaxed, and one example (CP violating phases) where they are not.

17 pages in LaTeX, including 10 encapsulated postscript figures, uses appolb.cls which is included; To appear in the proceedings of Ustron`99, XXIII School of Theoretical Physics