More on cosmological constraints on spontaneous R-symmetry breaking models

Journal Article · Wed Jan 01 00:00:00 EST 2014 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2014/01/024· OSTI ID:22369806

Hamada, Yuta; Kobayashi, Tatsuo ^[1]; Kamada, Kohei ^[2]; Ookouchi, Yutaka ^[3]

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1. Department of Physics, Kyoto University, Kyoto, 606-8502 (Japan)
2. Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, Hamburg, D-22607 (Germany)
3. Faculty of Arts and Science, Kyushu University, Fukuoka, 819–0395 (Japan)

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{sup 12−14} GeV regardless of the value of R-axion mass.

• OSTI ID: 22369806
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 01; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
AXIONS
MASS
NUCLEOSYNTHESIS
PARTICLE DECAY
SPACE
SYMMETRY BREAKING