Particle Production during Inflation in Light of PLANCK
Cosmology and Nongalactic Astrophysics
2014-07-02 v2 General Relativity and Quantum Cosmology
High Energy Physics - Theory
Abstract
We consider trapped inflation in a higher dimensional field space: particle production at a dense distribution of extra species points leads to a terminal velocity at which inflation can be driven in steep potentials. We compute an additional, nearly scale invariant contribution to the power-spectrum, caused by back-scattering of the continuously produced particles. Since this contribution has a blue tilt, it has to be sub-dominant, leading to an upper bound on the coupling constant between the inflatons and the extra species particles. The remaining allowed parameter space is narrow.
Cite
@article{arxiv.1309.4082,
title = {Particle Production during Inflation in Light of PLANCK},
author = {Diana Battefeld and Thorsten Battefeld and Daniel Fiene},
journal= {arXiv preprint arXiv:1309.4082},
year = {2014}
}
Comments
v.2. 11 pages, 3 figures; considerably revised (faulty computation cut); qualitative conclusions are unaffected