Mixed inflaton and curvaton perturbations
Astrophysics
2009-11-10 v2 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
A recent variant of the inflationary paradigm is that the ``primordial'' curvature perturbations come from quantum fluctuations of a scalar field, subdominant and effectively massless during inflation, called the ``curvaton'', instead of the fluctuations of the inflaton field. We consider the situation where the primordial curvature perturbations generated by the quantum fluctuations of an inflaton and of a curvaton field are of the same order of magnitude. We compute the curvature perturbation and its spectrum in this case and we discuss the observational consequences.
Cite
@article{arxiv.astro-ph/0403258,
title = {Mixed inflaton and curvaton perturbations},
author = {David Langlois and Filippo Vernizzi},
journal= {arXiv preprint arXiv:astro-ph/0403258},
year = {2009}
}
Comments
28 pages, accepted for Phys. Rev. D