Curvaton in large field inflation

Tomohiro Fujita*, Masahiro Kawasaki, Shuichiro Yokoyama

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


We comprehensively explore the quadratic curvaton models in the chaotic inflation. In the light of the BICEP2 result r 0.2, all model parameters and relevant observables are computed. It is found the curvaton field value is constrained into a narrow range, σ = (10-2-10-1) and the running of the spectral index is ns′-10-3. We show that if the curvaton is added, the models are heavily degenerated on the ns - r plane. However, introducing a new plane, the degeneracy can be resolved. To distinguish the curvaton models, precise measurements of not only r but also ns′ and the tensor tilt nT are required.

Original languageEnglish
Article number015
JournalJournal of Cosmology and Astroparticle Physics
Issue number9
Publication statusPublished - 2014 Sep 1
Externally publishedYes


  • cosmological perturbation theory
  • cosmology of theories beyond the SM
  • ination

ASJC Scopus subject areas

  • Astronomy and Astrophysics


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