Large scale structure and supersymmetric inflation without fine tuning

G. Dvali, Q. Shafi, R. Schaefer

    Research output: Contribution to journalArticlepeer-review


    We explore constraints on the spectral index n of density fluctuations and the neutrino energy density fraction Ων from observations of large scale structure. The best fits imply n1 and Ων0.1-0.3, for Hubble constants 40-60 km s-1 Mpc-1. We present a new class of inflationary models based on realistic supersymmetric grand unified theories (GUTs) which do not have the usual "fine tuning" problems. The amplitude of primordial density fluctuations is found to be (MXMP)2, where MX (MP) denote the GUT (Planck) scale. The spectral index n=0.98, in excellent agreement with the observations.

    Original languageEnglish (US)
    Pages (from-to)1886-1889
    Number of pages4
    JournalPhysical Review Letters
    Issue number14
    StatePublished - 1994

    ASJC Scopus subject areas

    • General Physics and Astronomy


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