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The TeV-mass curvaton · Around

2010

The TeV-mass curvaton

Enqvist, Kari, Mazumdar, Anupam, Taanila, Olli

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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.

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