Cosmological constraints on spontaneous R-symmetry breaking models
High Energy Physics - Phenomenology
2015-06-12 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
Abstract
We study general constraints on spontaneous R-symmetry breaking models coming from the cosmological effects of the pseudo Nambu-Goldstone bosons, R-axions. They are substantially produced in the early Universe and may cause several cosmological problems. We focus on relatively long-lived R-axions and find that in a wide range of parameter space, models are severely constrained. In particular, R-axions with mass less than 1 MeV are generally ruled out for relatively high reheating temperature, GeV.
Keywords
Cite
@article{arxiv.1211.5662,
title = {Cosmological constraints on spontaneous R-symmetry breaking models},
author = {Yuta Hamada and Kohei Kamada and Tatsuo Kobayashi and Yutaka Ookouchi},
journal= {arXiv preprint arXiv:1211.5662},
year = {2015}
}
Comments
29 pages, 9 figures; v2:comments, references, and a figure added, published in JCAP