Natural inflation in SUSY and gauge-mediated curvature of the flat directions

Gia Dvali

    Research output: Contribution to journalArticle

    Abstract

    Supersymmetric theories often include the non-compact directions in the field space along which the tree level potential grows only up to a certain limited value (determined by the mass scale of the theory) and then stays constant for the arbitrarily large expectation value of the field parametrizing the direction. Above the critical value, the tree-level curvature is large and positive in the other directions. Such plateaux are natural candidates for the hybrid inflaton. The non-zero F-term density along the plateau spontaneously breaks SUSY and induces the one-loop logarithmic slope for the inflaton potential. The coupling of the inflaton to the Higgs fields in the complex representations of the gauge group, may result in a radiatively induced Fayet-Illiopoulos D-term during inflation, which destabilizes some of the squark and slepton flat directions. Corresponding soft masses can be larger than the Hubble parameter and thus, play a crucial role for the Affleck-Dine baryogenesis.

    Original languageEnglish (US)
    Pages (from-to)471-477
    Number of pages7
    JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
    Volume387
    Issue number3
    DOIs
    StatePublished - Oct 24 1996

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

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