Braneworld inflation from an effective field theory after WMAP three-year data

Details Braneworld inflation from an effective field theory after WMAP three-year data Braneworld inflation from an effective field theory after WMAP three-year data

2006-06-02

arxiv.org/abs/astro-ph/0606047v2

Phys.Rev. D74 (2006) 083503

Astronomy and Astrophysics

Astrophysics

11 pages, 5 figures; references updated and a few comments added; final version to appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.74.083503

In light of the results from the WMAP three-year sky survey, we study an inflationary model based on a single-field polynomial potential, with up to quartic terms in the inflaton field. Our analysis is performed in the context of the Randall-Sundrum II braneworld theory, and we consider both the high-energy and low-energy (i.e. the standard cosmology case) limits of the theory. We examine the parameter space of the model, which leads to both large-field and small-field inflationary type solutions. We conclude that small field inflation, for a potential with a negative mass square term, is in general favored by current bounds on the tensor-to-scalar perturbation ratio rs.

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