Hypercharged dark matter and direct detection as a probe of reheating.
Hypercharged dark matter and direct detection as a probe of reheating.
复制标题
超荷电暗物质和作为再加热探针的直接检测。
DOI：
10.1103/physrevlett.112.101301
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发表时间：
2013
影响因子：
8.6
通讯作者：
T. Yanagida
中科院分区：
文献类型：
--
作者：
B. Feldstein;M. Ibe;T. Yanagida
到目前为止，LHC缺乏新的物理学，削弱了TeV尺度热暗物质的论点。另一方面，较重的非热暗物质通常很难在实验上测试。在这里，我们考虑有趣的和一般的情况下，超荷暗物质，它可以允许沉重的暗物质质量，而不破坏可测性。计划中的直接探测实验将能够看到质量高达令人难以置信的1010 GeV的信号，这可以进一步探测再加热温度高达约109 GeV，这是由非热暗物质遗迹丰度确定的。暗物质散射的Z介导性质原则上可以通过比较不同探测器核上的散射率来确定，这反过来可以揭示暗物质质量。我们将讨论未来的实验在多大程度上能够做出这样的决定。
The lack of new physics at the LHC so far weakens the argument for TeV scale thermal dark matter. On the other hand, heavier, nonthermal dark matter is generally difficult to test experimentally. Here we consider the interesting and generic case of hypercharged dark matter, which can allow for heavy dark matter masses without spoiling testability. Planned direct detection experiments will be able to see a signal for masses up to an incredible 1010 GeV, and this can further serve to probe the reheating temperature up to about 109 GeV, as determined by the nonthermal dark matter relic abundance. The Z-mediated nature of the dark matter scattering may be determined in principle by comparing scattering rates on different detector nuclei, which in turn can reveal the dark matter mass. We will discuss the extent to which future experiments may be able to make such a determination.