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The Decay of the Inflaton in No-scale Supergravity
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We study the decay of the inflaton in no-scale supergravity and show that decay due to the gravitational interactions through supergravity effects is highly suppressed relative to the case in minimal supergravity or models with a generic Kahler potential. We also show that decay to gravitinos is suppressed. We demonstrate that decay and sufficient reheating are possible with the introduction of a non-trivial gauge kinetic term. This channel may be dominant in no-scale supergravity, yet yields a re-heating temperature which is low enough to avoid the gravitino problem while high enough for Big Bang Nucleosynthesis and baryogenesis.
Forward citations
Cited by 2 Pith papers
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How Accidental was Inflation?
A small, string-theoretically plausible deformation of the Starobinsky potential (lambda about 0.9999) fits the Planck plus ACT and DESI value of the spectral tilt better than the pure Starobinsky model, and introduce...
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Reheating in No-Scale Models of Inflation
Generalized no-scale models with R=2/(3α) for α≠1 or non-minimal gauge couplings allow unsuppressed inflaton decays, producing calculable reheating temperatures and (n_s,r) predictions.
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