Non-thermal production of pNGB dark matter and inflation
Non-thermal production of pNGB dark matter and inflation
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DOI：
10.1007/jhep03(2021)130
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发表时间：
2020-12
影响因子：
5.4
通讯作者：
Y. Abe;Takashi Toma;K. Yoshioka
中科院分区：
文献类型：
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作者：
Y. Abe;Takashi Toma;K. Yoshioka
伪南武-戈德斯通玻色子（pNGB）是暗物质的天然候选者，因为它避免了严重的直接检测界限。在本文中，我们表明，pNGB有另一个不同的和有趣的面对一个更高的对称性破缺规模。这种大的对称性破缺是由标准模型之外的各种物理学激发的。在这种情况下，pNGB相互作用由于Nambu-Goldstone性质而被抑制，并且即使在足够大的门户耦合下，冻结生产也不起作用。然后，我们研究了pNGB暗物质遗迹丰度从平衡生产通过微弱的希格斯门耦合。进一步探讨了对称破缺标量在pNGB模型中起暴胀子作用的可能性。暴胀子和暗物质统一在一个场中，暴胀子衰变产生pNGB是不可避免的。对于这些非热产生的遗迹丰富的pNGB暗物质和成功的暴胀，我们发现，暗物质的质量应该小于几个GeV的再加热温度和暴胀子质量的宽范围内。
A pseudo Nambu-Goldstone boson (pNGB) is a natural candidate of dark matter in that it avoids the severe direct detection bounds. We show in this paper that the pNGB has another different and interesting face with a higher symmetry breaking scale. Such large symmetry breaking is motivated by various physics beyond the standard model. In this case, the pNGB interaction is suppressed due to the Nambu-Goldstone property and the freeze-out production does not work even with sufficiently large portal coupling. We then study the pNGB dark matter relic abundance from the out-of-equilibrium production via feeble Higgs portal coupling. Further, a possibility is pursued the symmetry breaking scalar in the pNGB model plays the role of inflaton. The inflaton and dark matter are unified in a single field and the pNGB production from inflaton decay is inevitable. For these non-thermally produced relic abundance of pNGB dark matter and successful inflation, we find that the dark matter mass should be less than a few GeV in the wide range of the reheating temperature and the inflaton mass.