Spectral index in curvaton scenario

2008/07/06 by Qing-Guo Huang · 2 citations
Mathematics · Physics and Astronomy · #Astronomy #Astrophysics #Black Holes and Theoretical Physics #CMB cold spot #Computer science #Cosmic microwave background #Cosmology and Gravitation Theories #Econometrics #Galaxies: Formation, Evolution, Phenomena #Gaussian #Index (typography) #Inflation (cosmology) #Mathematics #Non-Gaussianity #Optics #Physics #Power (physics) #Quantum mechanics #Spectral density #Spectral index #Spectral line #Statistical physics #Statistics #Theoretical physics #astro-ph #gr-qc #hep-ph #hep-th

paper · pdf · doi:10.1103/physrevd.78.043515

published as Phys.Rev.D78:043515,2008 · 12 pages; refs added

arxiv created 2008/07/06 · openalex publication_date 2008/08/07 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

A red-tilted primordial power spectrum is preferred by WMAP five-year data and a large positive local-type non-Gaussianity f_NL might be observed as well. In this short paper we find that a red-tilted and large non-Gaussian primordial power spectrum cannot be naturally obtained in the curvaton model, because f_NL is related to the initial condition of inflation.

Citations

• Revisiting non-Gaussianity of multiple-field inflation from the field equation
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• Running spectral index from shooting-star moduli
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• ETERNAL CHAOTIC INFLATION
• Quantum field theory in de Sitter space: renormalization by point-splitting
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• Fluctuations in the New Inflationary Universe
• Isocurvature, non-Gaussianity, and the curvaton model
• Modulated inflation

Cited by

• Non-Gaussianities of single field inflation with nonminimal coupling
• Non-Gaussianity and baryonic isocurvature fluctuations in the curvaton scenario