太阳自旋依赖的暗物质-中子散射截面约束：被忽略的情形
Solar Spin-Dependent Dark Matter-Neutron Cross Section Constraints: The Lost Case
- Stockholm University and The Oskar Klein Centre for Cosmoparticle Physics（斯德哥尔摩大学与奥斯卡·克莱因宇宙粒子物理中心）
- Institute for Gravitation and the Cosmos, The Pennsylvania State University（宾夕法尼亚州立大学引力与宇宙研究所）
- Department of Physics, Princeton University（普林斯顿大学物理系）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
该研究首次计算太阳中自旋依赖的暗物质-中子散射的捕获与蒸发率，将预测的湮灭信号与观测对比，发现太阳对多个湮灭通道的约束超直接探测极限，还可延伸至中微子雾区以下。
AI中文摘要：
长期以来，太阳一直充当天然暗物质探测器，捕获晕族粒子，这些粒子与太阳原子核及电子发生散射，随后产生可被中微子或γ射线仪器探测到的暗物质湮灭间接信号。此前的研究已计算出暗物质与电子散射，以及自旋无关、自旋依赖的暗物质-质子散射的截面约束，但自旋依赖的暗物质-中子散射场景被忽视了，尽管其在直接探测中十分重要。我们首次计算了太阳中自旋依赖的暗物质-中子散射的捕获率与蒸发率，包含当前标准太阳模型中的奇中子同位素靶。将预测的湮灭信号与当前中微子及γ射线观测结果对比，并预估未来探测器的探测范围，我们发现太阳约束在多个湮灭通道上超过了直接探测极限；对于暗物质湮灭为长寿命媒介子的模型，这些约束可延伸至中微子雾区以下。
英文摘要：
The Sun has long served as a natural dark matter detector, capturing halo particles that scatter with solar nuclei and electrons and subsequently produce indirect signals from dark matter annihilation that can be probed by either neutrino or $γ$-ray instruments. Previous efforts have computed cross-section constraints for dark matter scattering with electrons, as well as spin-independent and spin-dependent dark matter-proton scattering. However, the spin-dependent dark matter-neutron scattering scenario has been neglected, despite its importance in direct detection. For the first time, we compute the capture and evaporation rates for spin-dependent dark matter-neutron scattering in the Sun, including odd-neutron isotope targets in the current standard solar model. Comparing the predicted annihilation signals against current neutrino and $γ$-ray observations, and projecting the reach of upcoming detectors, we find that solar constraints exceed direct detection limits for several annihilation channels. For models in which the dark matter annihilates into long-lived mediators, these constraints can extend below the neutrino fog.
