More on cosmological constraints on spontaneous R-symmetry breaking models
More on cosmological constraints on spontaneous R-symmetry breaking models
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更多关于自发 R 对称破缺模型的宇宙学约束
DOI：
10.1088/1475-7516/2014/01/024
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
Y. Ookouchi
中科院分区：
文献类型：
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作者：
Y. Hamada;K. Kamada;T. Kobayashi;Y. Ookouchi
本文研究了自发的R对称破缺模型，并讨论了由于伪南武-戈德斯通玻色子（R轴子）对该模型的宇宙学约束。为了补充我们以前的工作，我们考虑了具有相对较大质量的R-轴子。在这种情况下，模型参数，R-轴子质量和R-对称性破缺尺度，受到大爆炸核合成和R-轴子衰变和热等离子体产生的引力子的过度生产的限制。我们发现，允许的参数空间是非常小的高再热温度。对于低再热温度，U（1）R破缺标度fa被限制为fa < 10 12− 14 GeV，而不管R-轴子质量的值。
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.