The TeV-mass curvaton

Enqvist, Kari and Mazumdar, Anupam and Taanila, Olli (2010) The TeV-mass curvaton. Journal of Cosmology and Astroparticle Physics, 2010 (9). ISSN 1475-7516

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We consider the constraints for a curvaton with mass m ~ 1 TeV and show that they are not consistent with a purely quadratic potential. Even if the curvaton self-interactions were very weak, they must be accounted for as they affect the dynamical evolution of the curvature perturbation. We show that the only TeV-mass curvaton interaction potential that yields the correct perturbation amplitude, decays before the dark matter freeze-out, and does not give rise to non-Gaussian perturbations that are in conflict with the present limits, is given by V_int= sigma^8/M^4. The decay width of the curvaton should be in the range Gamma= 10^-15...10^-17 GeV. The model typically predicts large non-linearity parameters f_NL and g_NL that should be observable by the Planck satellite. We also discuss various physical possibilities to obtain the required small curvaton decay rate.

Item Type: Journal Article
Journal or Publication Title: Journal of Cosmology and Astroparticle Physics
Uncontrolled Keywords: /dk/atira/pure/researchoutput/libraryofcongress/qc
Departments: Faculty of Science and Technology > Physics
ID Code: 55928
Deposited By: ep_importer_pure
Deposited On: 17 Jul 2012 15:16
Refereed?: Yes
Published?: Published
Last Modified: 01 Jan 2020 07:59

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