Scale-dependence of Non-Gaussianity in the Curvaton Model
Cosmology and Nongalactic Astrophysics
2011-01-27 v3 High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
We investigate the scale-dependence of f_NL in the self-interacting curvaton model. We show that the scale-dependence, encoded in the spectral index n_{f_NL}, can be observable by future cosmic microwave background observations, such as CMBpol, in a significant part of the parameter space of the model. We point out that together with information about the trispectrum g_NL, the self-interacting curvaton model parameters could be completely fixed by observations. We also discuss the scale-dependence of g_NL and its implications for the curvaton model, arguing that it could provide a complementary probe in cases where the theoretical value of n_{f_NL} is below observational sensitivity.
Keywords
Cite
@article{arxiv.1007.5148,
title = {Scale-dependence of Non-Gaussianity in the Curvaton Model},
author = {Christian T. Byrnes and Kari Enqvist and Tomo Takahashi},
journal= {arXiv preprint arXiv:1007.5148},
year = {2011}
}
Comments
14 pages, 5 figures, Eq.(10) corrected