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 language | English |
|---|---|
| Article number | 024 |
| Journal | Journal of Cosmology and Astroparticle Physics |
| Volume | 2014 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Jan 1 2014 |
All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
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Hamada, Y., Kamada, K., Kobayashi, T., & Ookouchi, Y. (2014). More on cosmological constraints on spontaneous R-symmetry breaking models. Journal of Cosmology and Astroparticle Physics, 2014(1), [024]. https://doi.org/10.1088/1475-7516/2014/01/024