The Effect of Curvaton Decay on the Primordial Power Spectrum

Abstract

We study the effect of curvaton decay on the primordial power spectrum. Using analytical approximations and also numerical calculations, we find that the power spectrum is enhanced during the radiation dominated era after the curvaton decay. The amplitude of the Bardeen potential is controlled by the fraction of the energy density in the curvaton at the time of curvaton decay. We show that the enhancement in the amplitude of the primordial curvature perturbation is, however, not large enough to lead to primordial black hole overproduction on scales which re-enter the horizon after the time of curvaton decay.

13 pages, 6 figures

References in corpus (8)

• Generalised constraints on the curvature perturbation from primordial black holes
• Primordial black holes as a tool for constraining non-Gaussianity
• A numerical study of non-gaussianity in the curvaton scenario
• Separate Universes Do Not Constrain Primordial Black Hole Formation
• Primordial non-Gaussianity from two curvaton decays
• Constraints on the primordial curvature perturbation from primordial black holes
• Probability of primordial black hole formation and its dependence on the radial profile of initial configurations
• Curvaton and the inhomogeneous end of inflation

Cited by in corpus (5)

• Primordial black holes from inflaton and spectator field perturbations in a matter-dominated era
• Primordial black hole constraints for curvaton models with predicted large non-Gaussianity
• Primordial black holes in the curvaton model: possible connections to pulsar timing arrays and dark matter
• Primordial Black Hole Formation in Non-Minimal Curvaton Scenario
• Primordial black hole formation from non-Gaussian curvature perturbations