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arXiv 2105.01263hep-ph
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热暗物质候选者的领域

The domain of thermal dark matter candidates

Rupert Coy, Thomas Hambye, Michel H. G. Tytgat, Laurent Vanderheyden

摘要:

我们认为,在一般情况下,热暗物质候选人的可能的参数空间。我们假设,暗物质粒子是基本的,并在一个隐藏的部门与温度$T'$,这可能不同于标准模型的温度,$T$的热平衡。候选者位于$T'/T$与$m_{\rm dm}$平面中的一个区域中,该区域由模型独立的理论考虑和观测约束限定。前者包括从相对论性(相对论性底)和非相对论性(幺正性壁)时去耦的最大湮灭截面的暗物质候选者的限制,而后者涉及大爆炸核合成($N_{\rm eff}$天花板)和自由流。我们提出了三个简化的暗物质的情况下,具体展示了如何每个适合的域。

英文摘要:

We consider, in general terms, the possible parameter space of thermal dark matter candidates. We assume that the dark matter particle is fundamental and was in thermal equilibrium in a hidden sector with a temperature $T'$, which may differ from that of the Standard Model temperature, $T$. The candidates lie in a region in the $T'/T$ vs. $m_{\rm dm}$ plane, which is bounded by both model-independent theoretical considerations and observational constraints. The former consists of limits from dark matter candidates that decoupled when relativistic (the relativistic floor) and from those that decoupled when non-relativistic with the largest annihilation cross section allowed by unitarity (the unitarity wall), while the latter concerns big bang nucleosynthesis ($N_{\rm eff}$ ceiling) and free streaming. We present three simplified dark matter scenarios, demonstrating concretely how each fits into the domain.

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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