More on cosmological constraints on spontaneous R-symmetry breaking models

Yuta Hamada, Kohei Kamada, Tatsuo Kobayashi, Yutaka Ookouchi

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We study the spontaneous R-symmetry breaking model and investigate the cosmological constraints on this model due to the pseudo Nambu-Goldstone boson, R-axion. We consider the R-axion which has relatively heavy mass in order to complement our previous work. In this regime, model parameters, R-axions mass and R-symmetry breaking scale, are constrained by Big Bang Nucleosynthesis and overproduction of the gravitino produced from R-axion decay and thermal plasma. We find that the allowed parameter space is very small for high reheating temperature. For low reheating temperature, the U(1)R breaking scale fa is constrained as fa < 1012-14 GeV regardless of the value of R-axion mass.

Original languageEnglish
Article number024
JournalJournal of Cosmology and Astroparticle Physics
Volume2014
Issue number1
DOIs
Publication statusPublished - Jan 1 2014

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics

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