Simplified Smooth Inflation with Observable Gravity Waves
Abstract
We consider a simplified version of supersymmetric smooth hybrid inflation which contains a single ultraviolet cutoff mP = 2.4 x 1018 GeV, instead of the two cutoffs mP and M* ~ few x 1017 GeV that are normally employed. With global supersymmetry the scalar spectral index ns ~ 0.97, which is in very good agreement with the WMAP observations. With a non-minimal Kahler potential, the supergravity version of the model is compatible with the current central values of ns and also yields potentially observable gravity waves (tensor to scalar ratio r <~ 0.02).
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