Primordial density perturbation in the curvaton scenario

2002/08/31 by David H. Lyth, Carlo Ungarelli, David Wands · 29 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #astro-ph #hep-ph #hep-th

paper · pdf · doi:10.1103/physrevd.67.023503

published as Phys.Rev.D67:023503,2003 · 13 pages, latex with revtex, no figures; v2 caveat added to calculation of isocurvature perturbations in section IV; v3 minor corrections, references added, to appear in Phys Rev D

arxiv created 2002/10/10 · openalex publication_date 2003/01/10 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04

Abstract

We analyze the primordial density perturbation when it is generated by a ``curvaton'' field different from the inflaton. In some cases this perturbation may have large isocurvature components, fully correlated or anticorrelated with the adiabatic component. It may also have a significant non-Gaussian component. All of these effects are calculated in a form which will enable direct comparison with current and forthcoming observational data.

Citations

• Vacuum fluctuations in axion-dilaton cosmologies
• General primordial cosmic perturbation

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