Inflation with large supergravity corrections

Anupam Mazumdar, Seshadri Nadathur, Philip Stephens

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It is well known that large Hubble-induced supergravity corrections to the inflaton field can ruin the flatness of the potential, thus creating a tension between slow-roll inflation and supergravity. In this paper we show that it is possible to obtain a cosmologically flat direction, embedded within the minimal supersymmetric standard model, despite very large super-Hubble corrections. As an illustration, we show that a flat direction which is lifted by an n = 6 operator matches the current cosmic microwave background data for a wide range of the Hubble parameter, 105 GeV ≲ Hinf ≲ 108.5 GeV. Our approach can be applied to any F-term inflationary model.

Original languageEnglish
Article number045001
Number of pages5
JournalPhysical Review D
Issue number4
Early online date3 Feb 2012
Publication statusPublished - 15 Feb 2012


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