Cosmologically safe QCD axion as a present from extra dimension

Masahiro Kawasaki, Masaki Yamada, Tsutomu T. Yanagida

研究成果: Article査読

13 被引用数 (Scopus)

抄録

We propose a QCD axion model where the origin of PQ symmetry and suppression of axion isocurvature perturbations are explained by introducing an extra dimension. Each extra quark-antiquark pair lives on branes separately to suppress PQ breaking operators. The size of the extra dimension changes after inflation due to an interaction between inflaton and a bulk scalar field, which implies that the PQ symmetry can be drastically broken during inflation to suppress undesirable axion isocurvature fluctuations.

本文言語English
ページ(範囲)12-16
ページ数5
ジャーナルPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
750
DOI
出版ステータスPublished - 2015 11 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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