Inflation parameters from Gauss-Bonnet braneworld

Details Inflation parameters from Gauss-Bonnet braneworld Inflation parameters from Gauss-Bonnet braneworld

2004-09-06

arxiv.org/abs/astro-ph/0409106v2

Phys.Lett. B608 (2005) 1-9

Astronomy and Astrophysics

Astrophysics

13 pages, version to appear in PLB

Scientific paper

10.1016/j.physletb.2005.01.019

We calculate the spectral index and tensor-to-scalar ratio for patch inflation arisen from the Gauss-Bonnet braneworld scenario. The patch cosmological models consist of Gauss-Bonnet (GB), Randall-Sundrum (RS), and 4D general relativistic (GR) cases. In order to compare with the observation data, we perform leading-order calculations for all patch models by choosing large-field, small-field, and hybrid potentials. We show that the large-field potentials are sensitive to a given patch model, while the small-field and hybrid potentials are insensitive to a given patch model. It is easier to discriminates between quadratic potential and quartic potential in the GB model rather than RS and GR models. Irrespective of patch models, it turns out that the small-field potentials are the promising models in view of the observation.

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