Non-Gaussianity from Attractor Curvaton
High Energy Physics - Phenomenology
2013-03-27 v1 Cosmology and Nongalactic Astrophysics
Abstract
We propose a curvaton model in which the initial condition of the curvaton oscillation is determined by its attractor behavior during inflation. Assuming a chaotic inflation model, we find that the initial condition determined by the attractor behavior is appropriate to generate a sizable non-Gaussianity contribution to the curvature perturbation, which will be tested in the foreseeable future. Implications on the thermal history of the universe and on particle physics models are also discussed.
Cite
@article{arxiv.1211.3535,
title = {Non-Gaussianity from Attractor Curvaton},
author = {Keisuke Harigaya and Masahiro Ibe and Masahiro Kawasaki and Tsutomu T. Yanagida},
journal= {arXiv preprint arXiv:1211.3535},
year = {2013}
}
Comments
19 pages, 1 figure