sub-GeV / $c^2$直接暗物质搜索中的相干光子散射背景
The coherent photon scattering background in sub-GeV/$c^2$ direct dark matter searches
摘要：
拟议的暗物质探测器与eV尺度的灵敏度将检测到一个大的背景原子（核）反冲相干光子散射。这个背景在$\sim10$ ~eVnr以下急剧上升，远远超过低能康普顿反冲的下降速率。即将到来的新一代暗物质探测器将不受此背景的限制，但eV级和亚eV级探测器的进一步发展将需要使用低$Z$目标材料，如氦，以避免大速率的相干光子散射，或高效的方法来拒绝光子散射时。
英文摘要：
Proposed dark matter detectors with eV-scale sensitivities will detect a large background of atomic (nuclear) recoils from coherent photon scattering. This background climbs steeply below $\sim10$~eVnr, far exceeding the declining rate of low-energy Compton recoils. The upcoming generation of dark matter detectors will not be limited by this background, but further development of eV-scale and sub-eV detectors will require the use of low-$Z$ target materials, such as helium, to avoid a large rate of coherent photon scattering, or highly efficient methods to reject photons when they scatter.
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