Solving the tension between high-scale inflation and axion isocurvature perturbations

Tetsutaro Higaki, Kwang Sik Jeong, Fuminobu Takahashi

研究成果: Article査読

41 被引用数 (Scopus)

抄録

The BICEP2 experiment determined the Hubble parameter during inflation to be about 1014 GeV. Such high inflation scale is in tension with the QCD axion dark matter if the Peccei-Quinn (PQ) symmetry remains broken during and after inflation, because too large axion isocurvature perturbations would be generated. The axion isocurvature perturbations can be suppressed if the axion acquires a sufficiently heavy mass during inflation. We show that this is realized if the PQ symmetry is explicitly broken down to a discrete symmetry and if the breaking is enhanced during inflation. We also show that, even when the PQ symmetry becomes spontaneously broken after inflation, such a temporarily enhanced PQ symmetry breaking relaxes the constraint on the axion decay constant.

本文言語English
ページ(範囲)21-26
ページ数6
ジャーナルPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
734
DOI
出版ステータスPublished - 2014 6 27
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

フィンガープリント

「Solving the tension between high-scale inflation and axion isocurvature perturbations」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル