Curvaton reheating: an application to braneworld inflation

Details Curvaton reheating: an application to braneworld inflation Curvaton reheating: an application to braneworld inflation

2003-02-04

arxiv.org/abs/astro-ph/0302054v2

Phys.Rev. D68 (2003) 043517

Astronomy and Astrophysics

Astrophysics

8 pages RevTeX4 file with two figures incorporated. Improved referencing, matches PRD accepted version

Scientific paper

10.1103/PhysRevD.68.043517

The curvaton was introduced recently as a distinct inflationary mechanism for generating adiabatic density perturbations. Implicit in that scenario is that the curvaton offers a new mechanism for reheating after inflation, as it is a form of energy density not diluted by the inflationary expansion. We consider curvaton reheating in the context of a braneworld inflation model, {\em steep inflation}, which features a novel use of the braneworld to give a new mechanism for ending inflation. The original steep inflation model featured reheating by gravitational particle production, but the inefficiency of that process brings observational difficulties. We demonstrate here that the phenomenology of steep inflation is much improved by curvaton reheating.

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