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Inflation with large supergravity corrections

Research output: Contribution to journalJournal article

Published

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Journal publication date3/02/2012
JournalPhysical Review D – Particles and Fields
Journal number4
Volume85
Number of pages5
Original languageEnglish

Abstract

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 {\it 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, $10^{5} {\rm GeV}\lesssim H_{inf}\lesssim 10^{8.5}$ GeV. Our approach can be applied to any $F$-term inflationary model.

Bibliographic note

5 pages, 1 figure. This version updated to match published version in PRD. Title changed in accordance with journal request. © 2012 American Physical Society