Revisiting the cosmological coherent oscillation

Masahiro Kawasaki, Naoya Kitajima, Kazunori Nakayama

研究成果: Article査読

1 被引用数 (Scopus)

抄録

It is often the case that scalar fields are produced in the early Universe in the form of coherent oscillation. These scalar fields may have huge abundances and affect the evolution of the Universe. In particular, if the lifetime is long enough, they may cause cosmological disasters. We revisit the issue of coherent oscillation of the scalar field when it couples with another oscillating scalar field, and find a situation that the abundance, or the amplitude of the oscillation, is significantly reduced by a variant type of the adiabatic suppression mechanism. As a concrete example, it is applied to the saxion, a flat direction in the supersymmetric axion model, and we show that the cosmological saxion problem is solved in a particular setup.

本文言語English
論文番号023513
ジャーナルPhysical Review D - Particles, Fields, Gravitation and Cosmology
87
2
DOI
出版ステータスPublished - 2013 1 18
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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