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Inflation with large supergravity corrections

Mazumdar, Anupam and Nadathur, Seshadri and Stephens, Philip (2012) Inflation with large supergravity corrections. Physical Review D – Particles and Fields, 85 (4). ISSN 1550-2368

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    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.

    Item Type: Article
    Journal or Publication Title: Physical Review D – Particles and Fields
    Additional Information: 5 pages, 1 figure. This version updated to match published version in PRD. Title changed in accordance with journal request. © 2012 American Physical Society
    Subjects: Q Science > QC Physics
    Departments: Faculty of Science and Technology > Physics
    ID Code: 55936
    Deposited By: ep_importer_pure
    Deposited On: 19 Jul 2012 16:39
    Refereed?: Yes
    Published?: Published
    Last Modified: 09 Apr 2014 23:49
    Identification Number:
    URI: http://eprints.lancs.ac.uk/id/eprint/55936

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