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 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.


Published in:
Journal Of Cosmology And Astroparticle Physics, 1
Year:
2014
Publisher:
Bristol, Iop Publishing Ltd
ISSN:
1475-7516
Keywords:
Laboratories:




 Record created 2014-04-14, last modified 2018-03-17


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