Implications of the Curvaton on Inflationary Cosmology

Details Implications of the Curvaton on Inflationary Cosmology Implications of the Curvaton on Inflationary Cosmology

2005-05-17

arxiv.org/abs/astro-ph/0505339v1

Phys.Rev. D72 (2005) 023505

Astronomy and Astrophysics

Astrophysics

21 pages, 9 figures

Scientific paper

10.1103/PhysRevD.72.023505

We study implications of the curvaton, a late-decaying light scalar field, on inflationary cosmology, paying particular attentions to modifications of observable quantities such as the scalar spectral index of the primordial power spectrum and the tensor-to-scalar ratio. We consider this issue from a general viewpoint and discuss how the observable quantities are affected by the existence of the curvaton. It is shown that the modification owing to the curvaton depends on class of inflation models. We also study the effects of the curvaton on inflation models generated by the inflationary flow equation.

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