Does the detection of primordial gravitational waves exclude low energy inflation?

Tomohiro Fujita, Ryo Namba, Yuichiro Tada

研究成果: Article査読

23 被引用数 (Scopus)

抄録

We show that a detectable tensor-to-scalar ratio (r≥10−3) on the CMB scale can be generated even during extremely low energy inflation which saturates the BBN bound ρinf≈(30MeV)4. The source of the gravitational waves is not quantum fluctuations of graviton but those of SU(2) gauge fields, energetically supported by coupled axion fields. The curvature perturbation, the backreaction effect and the validity of perturbative treatment are carefully checked. Our result indicates that measuring r alone does not immediately fix the inflationary energy scale.

本文言語English
ページ(範囲)17-21
ページ数5
ジャーナルPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
778
DOI
出版ステータスPublished - 2018 3 10
外部発表はい

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学

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