Large scale structure and supersymmetric inflation without fine tuning

G. Dvali; Q. Shafi; R. Schaefer

doi:10.1103/PhysRevLett.73.1886

Large scale structure and supersymmetric inflation without fine tuning

G. Dvali, Q. Shafi, R. Schaefer

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Abstract

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 language	English (US)
Pages (from-to)	1886-1889
Number of pages	4
Journal	Physical Review Letters
Volume	73
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevLett.73.1886
State	Published - 1994

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Large scale structure and supersymmetric inflation without fine tuning",

abstract = "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.",

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AB - 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.

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