Axion monodromy inflation with multi-natural modulations

Tetsutaro Higaki, Tatsuo Kobayashi, Osamu Seto, Yuya Yamaguchi

研究成果: Article

23 引用 (Scopus)

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We study parameter space in the axion monodromy inflation corrected by dynamically generated terms involving with the axion. The potential has the linear term with multiple sinusoidal functions, which play a role in generating modulations. We show that this potential leads both to a large tensor-to-scalar ratio rT ∼ 0.16 and to a large negative running of spectral index αs ∼ - (0.02 -0.03), ameliorating the tension between the result of the PLANCK and that of the BICEP2. To realize these results, a small hierarchy among dynamical scales is required whereas the decay constants in sinusoidal functions remain sub-Planckian in this model. We discuss also reheating process after the inflation in a bottom-up approach.

元の言語English
記事番号025
ジャーナルJournal of Cosmology and Astroparticle Physics
2014
発行部数10
DOI
出版物ステータスPublished - 2014 10 1

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ASJC Scopus subject areas

  • Astronomy and Astrophysics

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