Year: 2011
Type: article
Abstract: We study the scale dependence of the non-linearity parameters f NL and g NL in curvaton models with self-interactions. We show that the spectral indices n f NL = d ln| f NL |/d ln k and n g NL = d ln| g NL |/d ln k can take values much greater than the slow-roll parameters and the spectral index of the power spectrum. This means that the scale-dependence of the bi and trispectrum could be easily observable in this scenario with Planck, which would lead to tight additional constraints on the model. Inspite of the highly non-trivial behaviour of f NL and g NL in the curvaton models with self-interactions, we find that the model can be falsified if g NL ( k ) is also observed.
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2069083939