Large tensor non-Gaussianity from axion-gauge field dynamics

Aniket Agrawal, Tomohiro Fujita, Eiichiro Komatsu

研究成果: Article査読

46 被引用数 (Scopus)

抄録

We show that an inflation model in which a spectator axion field is coupled to an SU(2) gauge field produces a large three-point function (bispectrum) of primordial gravitational waves, Bh, on the scales relevant to the cosmic microwave background experiments. The amplitude of the bispectrum at the equilateral configuration is characterized by Bh/Ph2=O(10)×ΩA-1, where ΩA is a fraction of the energy density in the gauge field and Ph is the power spectrum of gravitational waves produced by the gauge field.

本文言語English
論文番号103526
ジャーナルPhysical Review D
97
10
DOI
出版ステータスPublished - 2018 5 15
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(その他)

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