Tensor spectra templates for axion-gauge fields dynamics during inflation

Tomohiro Fujita, Evangelos I. Sfakianakis, Maresuke Shiraishi

研究成果: Article査読

10 被引用数 (Scopus)

抄録

SU(2) gauge fields can generate large gravitational waves during inflation, if they are coupled to an axion which can be either the inflaton or a spectator field. The shape of the produced tensor power spectrum h depends on the form of the axion potential. We derive analytic expressions and provide general templates for h for various types of the spectator axion potential. Furthermore, we explore the detectability of the oscillatory feature, which is present in h in the case of an axion monodromy model, by possible future CMB B-mode polarization observations.

本文言語English
論文番号057
ジャーナルJournal of Cosmology and Astroparticle Physics
2019
5
DOI
出版ステータスPublished - 2019 4月 30
外部発表はい

ASJC Scopus subject areas

  • 天文学と天体物理学

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