2013/10/31 by Yuta Hamada, Kohei Kamada, Tatsuo Kobayashi +1 · 7 citations
Physics and Astronomy · #Big Bang nucleosynthesis #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Gravitino #Nucleosynthesis #Parameter space #Particle physics theoretical and experimental studies #Scale (ratio) #Space (punctuation) #Supersymmetry breaking #Symmetry breaking #astro-ph.CO #hep-ph #hep-th
paper · pdf · doi:10.1088/1475-7516/2014/01/024
published in Journal of Cosmology and Astroparticle Physics 2014(01), 024 (Institute of Physics) · 15 pages, 4 figures, published in JCAP
arxiv created 2014/01/14 · openalex publication_date 2014/01/14 · arxiv updated 2014/01/15 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/08
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.