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arXiv 1608.07296astro-ph.COhep-ph
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地球束缚暗物质的直接探测

Direct Detection of Dark Matter Bound to the Earth

Riccardo Catena, Chris Kouvaris

摘要:

我们研究的性质和直接检测前景的一个尚未被忽视的人口的暗物质(DM)粒子在轨道上运动的引力约束到地球。这个DM人口预计将通过地球内部的原子核散射形成。我们计算通量和核反冲能谱预计在直接探测实验中考虑探测器的新DM人口与无方向灵敏度,和不同类型的目标材料和DM-核子相互作用。DM粒子绑定到地球表现为一个显着的上升,在所观察到的核反冲能谱的低能量部分。需要约1 eV的超低阈值能量来解决这种效应。它的形状是独立的DM-核散射截面归一化。

英文摘要:

We study the properties and direct detection prospects of an as of yet neglected population of dark matter (DM) particles moving in orbits gravitationally bound to the Earth. This DM population is expected to form via scattering by nuclei in the Earth's interior. We compute fluxes and nuclear recoil energy spectra expected at direct detection experiments for the new DM population considering detectors with and without directional sensitivity, and different types of target materials and DM-nucleon interactions. DM particles bound to the Earth manifest as a prominent rise in the low-energy part of the observed nuclear recoil energy spectrum. Ultra-low threshold energies of about 1 eV are needed to resolve this effect. Its shape is independent of the DM-nucleus scattering cross-section normalisation.

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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