Smooth hybrid inflation in a supersymmetric axion model

Masahiro Kawasaki, Naoya Kitajima, Kazunori Nakayama

研究成果: Article査読

2 被引用数 (Scopus)

抄録

We show that the smooth hybrid inflation is naturally realized in a framework of a supersymmetric axion model. Identifying the Peccei-Quinn scalar fields as a part of the inflaton sector, successful inflation takes place reproducing the amplitude and spectral index of the curvature perturbation observed by WMAP. A relatively large axion isocurvature perturbation and its non-Gaussianity are predicted in our model. The saxion coherent oscillation has a large amplitude and dominates the Universe. The subsequent decay of the saxion produces a huge amount of entropy, which dilutes unwanted relics. Winos, the lightest supersymmetric particles in this scenario, are produced nonthermally in the decay and account for dark matter.

本文言語English
論文番号035010
ジャーナルPhysical Review D - Particles, Fields, Gravitation and Cosmology
87
3
DOI
出版ステータスPublished - 2013 2月 6
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
  • 物理学および天文学(その他)

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