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Spectral Index in Curvaton Scenario

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arxiv 0807.0050 v2 pith:V53VGC6Y submitted 2008-07-01 hep-th astro-phgr-qchep-ph

Qing-Guo Huang This is my paper · ORCID
classification hep-thastro-phgr-qchep-ph
keywords curvatonlargepowerprimordialspectrumtiltedbecausecannot
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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.

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  1. Curvaton distribution from stochastic inflation

    astro-ph.CO 2024-11 conditional novelty 5.0 of 10

    Closed-form probability distributions for the curvature perturbation are derived for four exactly solvable curvaton potentials, and the mass-decay-rate parameter space is split into regions by the probability of produ...

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