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Large Non-Gaussianity Implication for Curvaton Scenario

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arxiv 0801.0467 v3 pith:7FVRVRDX submitted 2008-01-03 hep-th astro-ph

Qing-Guo Huang This is my paper · ORCID
classification hep-thastro-ph
keywords non-gaussianityabovearguearoundboundedcdotcurvatondensity
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abstract

We argue that the typical energy density of a light scalar field should not be less than $H^4$ in the inflationary Universe. This requirement implies that the non-Gaussianity parameter $f_{NL}$ is typically bounded by the tensor-scalar ratio $r$ from above, namely $f_{NL}\lesssim 518\cdot r^{1\over 4}$. If $f_{NL}=10^2$, inflation occurred around the GUT scale.

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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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