Gaugino Condensation as the Origin of Primordial Fluctuations

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I present a model for inflation based on the gaugino-dilaton dynamics of supersymmetry breaking. The inflaton is the dimension--1 scalar field ϕ related to the gaugino condensate via λᵗλ=ϕ³. Recent work in this area is used to obtain two significant results: (1) Scalar density fluctuations at second horizon crossing are generated on scale λ with amplitude =A· 10³·(mSUSYmPl)(λ100Mpc)⁰.⁰³, where A is a constant which depends on (unknown) details of gaugino-dilaton dynamics in the strong-coupling phase. Agreement with COBE results is obtained if A≃ 2. (2) Due to mixing with hidden sector glueballs, the dilaton mass is large ((∓²)¹/³ 10⁸GeV), and reheating takes place at T 1. This necessitates that the presently observed baryon asymmetry be generated at a cosmic temperature below 1 TeV.