Strongly scale-dependent polyspectra from curvaton self-interactions

Byrnes C, Enqvist K, Nurmi S, Takahashi T (2011)
Journal of Cosmology and Astroparticle Physics 2011(11).

Journal Article | Published | English

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We study the scale dependence of the non-linearity parameters f_NL and g_NL in curvaton models with self-interactions. We show that the spectral indices n_fNL=d ln|f_NL|/(d ln k) and n_gNL=d ln |g_NL|/(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 of the highly non-trivial behaviour of f_NL and g_NL in the curvaton models with self-interactions, we find that the model can be falsified if g_NL(k) is also observed.
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Byrnes C, Enqvist K, Nurmi S, Takahashi T. Strongly scale-dependent polyspectra from curvaton self-interactions. Journal of Cosmology and Astroparticle Physics. 2011;2011(11).
Byrnes, C., Enqvist, K., Nurmi, S., & Takahashi, T. (2011). Strongly scale-dependent polyspectra from curvaton self-interactions. Journal of Cosmology and Astroparticle Physics, 2011(11).
Byrnes, C., Enqvist, K., Nurmi, S., and Takahashi, T. (2011). Strongly scale-dependent polyspectra from curvaton self-interactions. Journal of Cosmology and Astroparticle Physics 2011.
Byrnes, C., et al., 2011. Strongly scale-dependent polyspectra from curvaton self-interactions. Journal of Cosmology and Astroparticle Physics, 2011(11).
C. Byrnes, et al., “Strongly scale-dependent polyspectra from curvaton self-interactions”, Journal of Cosmology and Astroparticle Physics, vol. 2011, 2011.
Byrnes, C., Enqvist, K., Nurmi, S., Takahashi, T.: Strongly scale-dependent polyspectra from curvaton self-interactions. Journal of Cosmology and Astroparticle Physics. 2011, (2011).
Byrnes, Christian, Enqvist, Kari, Nurmi, Sami, and Takahashi, Tomo. “Strongly scale-dependent polyspectra from curvaton self-interactions”. Journal of Cosmology and Astroparticle Physics 2011.11 (2011).
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