Spectral Index in Curvaton Scenario

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 note we find that a red tilted and large non-Gaussian primordial power spectrum cannot be naturally obtained in curvaton model, because $f_{NL}$ is related to the initial condition of inflation.

12 pages; refs added

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Cited by in corpus (19)

• Curvaton with Polynomial Potential
• Entropy-Corrected Holographic Dark Energy
• Curvaton Dynamics and the Non-Linearity Parameters in Curvaton Model
• A geometric description of the non-Gaussianity generated at the end of multi-field inflation
• The Curvature Perturbation in the Axion-type Curvaton Model
• Primordial Trispectrum from Entropy Perturbations in Multifield DBI Model
• Non-Gaussianity and Baryonic Isocurvature Fluctuations in the Curvaton Scenario
• The Trispectrum in the Multi-brid Inflation
• N-vaton
• Multi-Stream Inflation
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• Non-Gaussianities of Single Field Inflation with Non-minimal Coupling
• The trispectrum in ghost inflation
• G-Curvaton
• Non-Gaussianity with Lagrange Multiplier Field in the Curvaton Scenario
• 1/R Correction to Gravity in the Early Universe
• Reconstruction of the isocurvaton scenario
• Spectator fields and their imprints on the Cosmic Microwave Background
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