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arXiv 1111.5962hep-phastro-ph.CO
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DFSZ轴子的宇宙学

Cosmology of the DFSZ axino

Kyu Jung Bae, Eung Jin Chun, Sang Hui Im

摘要:

我们研究了超对称DFSZ轴子模型的宇宙学影响。扩展最近的工作,我们首先提供了一个全面的分析热生产的DFSZ axino考虑所有可能的散射,衰变和逆衰变过程取决于各种质量参数和再热温度。虽然DFSZ轴伴很难达到热平衡,但它的耦合仍然足够大,可以产生巨大的轴伴布居数,从而形成过剩的中性伴密度。我们检查中性伴子参数空间,以确定暗物质属性取决于Peccei-Quinn标度。当Peccei-Quinn标度变高导致轴子寿命变长时,中性伴暗物质出现在较轻的类希格斯诺LSP区域或更受限制的类比诺LSP区域,允许通过CP-奇希格斯玻色子共振湮灭以满足更强的再湮灭。

英文摘要:

We study the cosmological impact of the supersymmetric DFSZ axion model. Extending recent works, we first provide a comprehensive analysis of thermal production of the DFSZ axino considering all the possible scattering, decay and inverse decay processes depending on various mass parameters and the reheat temperature. Although it is hard for the DFSZ axino to be in thermal equilibrium, its coupling is still large enough to generate huge axino population which can turn into overabundant neutralino density. We examine the neutralino parameter space to identify the dark matter property depending on the Peccei-Quinn scale. As the Peccei-Quinn scale becomes higher resulting in longer axino lifetime, the neutralino dark matter appears in a lighter Higgsino-like LSP region or a more restricted Bino-like LSP region allowing a resonant annihilation through a CP-odd Higgs boson to meet stronger reannihilation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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