Strongly scale-dependent polyspectra from curvaton self-interactions

  title={Strongly scale-dependent polyspectra from curvaton self-interactions},
  author={C. Byrnes and K. Enqvist and S. Nurmi and T. Takahashi},
  journal={Journal of Cosmology and Astroparticle Physics},
  • C. Byrnes, K. Enqvist, +1 author T. Takahashi
  • Published 2011
  • Physics
  • Journal of Cosmology and Astroparticle Physics
  • We study the scale dependence of the non-linearity parameters fNL and gNL in curvaton models with self-interactions. We show that the spectral indices nfNL = d ln|fNL|/d ln k and ngNL = d ln|gNL|/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… CONTINUE READING

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