The TeV mass curvaton

Journal Article · Wed Sep 01 04:00:00 EDT 2010 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2010/09/030· OSTI ID:22275439

Enqvist, Kari ^[1]; Mazumdar, Anupam ^[2]; Taanila, Olli ^[3]

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1. Physics Department, University of Helsinki, FI-00014, Helsinki (Finland)
2. Physics Department, Lancaster University, Lancaster LA1 4YB (United Kingdom)
3. Helsinki Institute of Physics, University of Helsinki, FI-00014, Helsinki (Finland)

We consider the constraints for a curvaton with mass m ∼ O(1) TeV and show that they are not consistent with a purely quadratic potential. Even if the curvaton self-interactions are very weak, they must be accounted for as they affect the dynamical evolution of the curvature perturbation. We show that the only monomial self-interaction for a TeV-mass curvaton that (a) yields the correct perturbation amplitude, (b) decays before the dark matter freeze-out, and (c) does not give rise to non-Gaussian perturbations that would be in conflict with the present limits, is given by V{sub int} = σ{sup 8}/M{sup 4}. The decay width of the curvaton should be in the range Γ = 10{sup −15}−10{sup −17} GeV. The model typically predicts large non-linearity parameters f{sub NL} and g{sub NL} that should be observable by the Planck satellite. We also discuss various physical possibilities to obtain the required small curvaton decay rate.

• OSTI ID: 22275439
• Journal Information: Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 09 Vol. 2010; ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
COSMOLOGICAL MODELS
COSMOLOGY
DISTURBANCES
GEV RANGE
LIMITING VALUES
NONLUMINOUS MATTER
POTENTIALS
REST MASS
TEV RANGE