The 7 keV axion dark matter and the X-ray line signal

Tetsutaro Higaki, Kwang Sik Jeong, Fuminobu Takahashi

研究成果: Article査読

77 被引用数 (Scopus)

抄録

We propose a scenario where the saxion dominates the energy density of the Universe and reheats the standard model sector via the dilatonic coupling, while its axionic partner contributes to dark matter decaying into photons via the same operator in supersymmetry. Interestingly, for the axion mass m a ≃ 7keV and the decay constant f a1014-15GeV, the recently discovered X-ray line at 3.5keV in the XMM Newton X-ray observatory data can be explained. We discuss various cosmological aspects of the 7keV axion dark matter such as the production of axion dark matter, the saxion decay process, hot dark matter and isocurvature constraints on the axion dark matter, and the possible baryogenesis scenarios.

本文言語English
ページ(範囲)25-31
ページ数7
ジャーナルPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
733
DOI
出版ステータスPublished - 2014 6月 2
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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