Reheating and gravitino production in braneworld inflation

Details Reheating and gravitino production in braneworld inflation Reheating and gravitino production in braneworld inflation

2005-05-17

arxiv.org/abs/hep-ph/0505149v2

Phys.Rev. D72 (2005) 023506

Physics

High Energy Physics

High Energy Physics - Phenomenology

24pages

Scientific paper

10.1103/PhysRevD.72.023506

We consider the constraints that can be imposed on a wide class of Inflation models in modified gravity scenarios in which the Friedmann equation is modified by the inclusion of $\rho^2$ terms, where $\rho$ is the total energy density. In particular we obtain the reheating temperature and gravitino abundance associated with the end of inflation. Whereas models of chaotic inflation and natural inflation can easily avoid the conventional gravitino overproduction problem, we show that supersymmetric hybrid inflation models (driven by both F and D-terms) do not work in the $\rho^2$ dominated era. We also study inflation driven by exponetial potentials in this modified background, and show that the gravitino production is suppressed enough to avoid there being a problem, although other conditions severely constrain these models.

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