More on cosmological constraints on spontaneous R-symmetry breaking models

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...

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Published inJournal of cosmology and astroparticle physics Vol. 2014; no. 1; pp. i - 13
Main Authors Hamada, Yuta, Kamada, Kohei, Kobayashi, Tatsuo, Ookouchi, Yutaka
Format Journal Article
LanguageEnglish
Published United States 01.01.2014
Subjects
Astronomical models
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
AXIONS
Breaking
Constraints
Cosmology
Gravitinos
Heating
MASS
Mathematical models
NUCLEOSYNTHESIS
PARTICLE DECAY
Reheating
SPACE
Spontaneous
SYMMETRY BREAKING
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Summary: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) sub(R) breaking scale f sub(a) is constrained as f sub(a) < 10 super(12-14) GeV regardless of the value of R-axion mass.
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ISSN:1475-7516
1475-7516
DOI:10.1088/1475-7516/2014/01/024