Non-Gaussianity and cosmic uncertainty in curvaton-type models

2006/02/28 by David H. Lyth, D. H. Lyth · 4 citations
Physics and Astronomy · #Advanced Differential Geometry Research #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #astro-ph #hep-ph #hep-th

paper · pdf · doi:10.1088/1475-7516/2006/06/015

published as JCAP0606:015,2006 · 21 pages, wmap year three data considered

arxiv created 2006/03/20 · openalex publication_date 2006/06/16 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30

Abstract

In curvaton-type models, observable non-Gaussianity of the curvature perturbation would come from a contribution of the form (δσ) 2 , where δσ is Gaussian. I analyse this situation allowing δσ to be scale dependent. The actual curvaton model is considered in more detail than before, including its cosmic uncertainty and anthropic status. The status of curvaton-type models after WMAP (Wilkinson microwave anisotropy probe) year three data is considered.

Citations

• Modular inflation and the orthogonal axion as the curvaton
• Non-Gaussian features of primordial fluctuations in single field inflationary models
• Non-Gaussianity from Inflation: Theory and Observations
• Cosmological perturbation with two scalar fields in reheating after inflation
• A General Analytic Formula for the Spectral Index of the Density Perturbations produced during Inflation
• Particle Physics Models of Inflation and the Cosmological Density Perturbation
• Non-Gaussianity from instant and tachyonic preheating
• Super-Horizon Scale Dynamics of Multi-Scalar Inflation
• Quantum field theory in de Sitter space: renormalization by point-splitting
• Non-Gaussianity from the second-order cosmological perturbation

Cited by

• Generation of perturbation after multi-field inflation
• Simple bounds from the perturbative regime of inflation
• Generating the Curvature Perturbation at the End of Inflation in String Theory
• Statistical anisotropy of the curvature perturbation from vector field perturbations