Minimal supergravity models of inflation

Sergio Ferrara, Renata Kallosh, Andrei Linde, Massimo Porrati

    Research output: Contribution to journalArticle

    Abstract

    We present a superconformal master action for a class of supergravity models with one arbitrary function defining the Jordan frame. It leads to a gauge-invariant action for a real vector multiplet, which upon gauge fixing describes a massive vector multiplet, or to a dual formulation with a linear multiplet and a massive tensor field. In both cases the models have one real scalar, the inflaton, naturally suited for single-field inflation. Vectors and tensors required by supersymmetry to complement a single real scalar do not acquire vacuum expectation values during inflation, so there is no need to stabilize the extra scalars that are always present in the theories with chiral matter multiplets. The new class of models can describe any inflaton potential that vanishes at its minimum and grows monotonically away from the minimum. In this class of supergravity models, one can fit any desirable choice of inflationary parameters ns and r.

    Original languageEnglish (US)
    Article number085038
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume88
    Issue number8
    DOIs
    StatePublished - Oct 30 2013

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics
    • Physics and Astronomy (miscellaneous)

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