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Dynamical Tuning of the Initial Condition for New Inflation in Supergravity

K. -I. Izawa·M. Kawasaki·T. Yanagida
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Abstract

We point out that for a class of `new inflation' models in supergravity the required initial value of the inflaton field is dynamically set if there is another inflation (`pre-inflation') before the `new inflation'. We study the dynamics of both inflatons by taking a hybrid inflation model for the `pre-inflation' as an example. We find out that our `new inflation' model provides reheating temperatures T_R \simeq 10 MeV - 10^4 GeV low enough to avoid the gravitino problem even in gauge-mediated supersymmetry-breaking models. We also construct a model where the scale for the `new inflation' is generated by nonperturbative dynamics of a supersymmetric gauge theory.

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K. -I. Izawa, M. Kawasaki, T. Yanagida. 1997-07-01. Dynamical Tuning of the Initial Condition for New Inflation in Supergravity. https://doi.org/10.1016/s0370-2693(97)01040-x

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