Detection of light dark matter with optical phonons in polar materials
Detection of light dark matter with optical phonons in polar materials
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DOI：
10.1016/j.physletb.2018.08.064
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发表时间：
2018-10-10
影响因子：
4.4
通讯作者：
Zurek, Kathryn M.
中科院分区：
文献类型：
--
作者：
Knapen, Simon;Lin, Tongyan;Zurek, Kathryn M.
我们表明，极性材料是很好的目标，直接检测亚GeV的暗物质，由于存在带隙的光学声子以及具有高声速的声学声子。我们以砷化镓（GaAs）为例，它具有实验实现所需的特性，并且许多结果可以通过分析来估计。我们发现GaAs具有良好的暗光子吸收能力，可以完全覆盖通过超轻暗光子散射的冻结基准，并且与其他探测亚MeV暗物质散射核的提议相比具有竞争力。(C)2018由Elsevier B.V.发布这是CC BY许可下的开放获取文章
We show that polar materials are excellent targets for direct detection of sub-GeV dark matter due to the presence of gapped optical phonons as well as acoustic phonons with high sound speed. We take the example of Gallium Arsenide (GaAs), which has the properties needed for experimental realization, and where many results can be estimated analytically. We find GaAs has excellent reach to dark photon absorption, can completely cover the freeze-in benchmark for scattering via an ultralight dark photon, and is competitive with other proposals to detect sub-MeV dark matter scattering off nuclei. (C) 2018 Published by Elsevier B.V. This is an open access article under the CC BY license