AI 中文总结
研究非弹性散射对增强暗物质衰减的影响，将共振散射纳入地球衰减框架并结合其他通道，利用 PandaX - 4T 数据对自旋无关的增强暗物质 - 核子截面得出新约束。
AI 中文摘要
地球衰减对于解释增强暗物质（DM）的直接探测约束至关重要，因为与地球原子核的散射会显著改变到达地下探测器的通量和能谱。在增强能量下，除普通弹性散射外的非弹性核通道变得重要，包括准弹性散射、深度非弹性散射和共振散射。本文将增强暗物质与原子核的共振散射纳入地球衰减框架，并结合弹性、准弹性和深度非弹性通道。发现在重媒介子 regime 中，共振散射对增强暗物质的衰减有不可忽略的贡献。利用最新的 PandaX - 4T 数据，我们对与自旋无关的增强暗物质 - 核子截面 $\bar{\sigma}_n$ 得出了新的约束。
英文摘要
Earth attenuation is crucial for interpreting direct-detection constraints on boosted dark matter (DM), since scatterings with terrestrial nuclei can significantly modify the flux and energy spectrum reaching underground detectors. At boosted energies, inelastic nuclear channels beyond ordinary elastic scattering can become relevant, including quasi-elastic scattering, deep-inelastic scattering, and resonant scattering. In this work, we incorporate the resonant scattering of boosted dark matter (DM) off nuclei into the Earth-attenuation framework, in combination with the elastic, quasi-elastic, and deep-inelastic channels. We find that, in the heavy-mediator regime, resonant scattering can give a non-negligible contribution to the attenuation of boosted DM. Using the latest PandaX-4T data, we derive new constraints on the spin-independent boosted DM-nucleon cross section $\barσ_n$.
Comments10pages, 6 figures
