More on cosmological constraints on spontaneous R-symmetry breaking models
High Energy Physics - Phenomenology
2014-01-15 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
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 f_a is constrained as f_a<10^{12-14}GeV regardless of the value of R-axion mass.
Keywords
Cite
@article{arxiv.1310.0118,
title = {More on cosmological constraints on spontaneous R-symmetry breaking models},
author = {Yuta Hamada and Kohei Kamada and Tatsuo Kobayashi and Yutaka Ookouchi},
journal= {arXiv preprint arXiv:1310.0118},
year = {2014}
}
Comments
15 pages, 4 figures, published in JCAP