论文标题
用于轻暗物质检测的最佳抗铁磁铁
Optimal anti-ferromagnets for light dark matter detection
论文作者
论文摘要
我们提出抗铁磁铁作为与自旋依赖性相互作用寻找子-MEV暗物质的最佳目标。这些材料即使对于非常小的动量转移也可以进行多碎发射，因此对像keV一样轻的暗物质颗粒敏感。我们使用有效的理论以简单的方式计算事件速率。在这里研究的材料中，我们将氧化镍（一种良好的抗铁磁铁）视为理想的候选目标。实际上，其无间隙强的传播速度非常接近典型的暗物质速度，即使仅通过发射单个磁杆，就可以吸收其所有动能。
We propose anti-ferromagnets as optimal targets to hunt for sub-MeV dark matter with spin-dependent interactions. These materials allow for multi-magnon emission even for very small momentum transfers, and are therefore sensitive to dark matter particles as light as the keV. We use an effective theory to compute the event rates in a simple way. Among the materials studied here, we identify nickel oxide (a well-assessed anti-ferromagnet) as an ideal candidate target. Indeed, the propagation speed of its gapless magnons is very close to the typical dark matter velocity, allowing the absorption of all its kinetic energy, even through the emission of just a single magnon.
