AI 中文总结
POLONAISE实验利用磁悬浮粒子开展超重暗物质首次搜寻，通过超导阱悬浮毫克级铁磁体，在特定质量和媒介子范围内对暗物质与中子的耦合及截面设定领先约束，扩展了悬浮传感的质量探测范围。
AI 中文摘要
我们开展了利用磁悬浮粒子对超重暗物质的首次搜寻。POLONAISE实验使用毫克级铁磁体悬浮于超导阱中，其力灵敏度达$0.07\\\\,\mathrm{fN\\,Hz^{-1/2}}$，可分辨小至$1\\,\mathrm{TeV}/c$的冲量。将每个候选冲量视为可能的暗物质事件，我们针对通过新轻媒介子相互作用的暗物质，设定了中子耦合$\alpha_n$的最优区间上限。对于暗物质质量在$10^6\\,\mathrm{GeV}/c^2$至$10^{15}\\,\mathrm{GeV}/c^2$之间、且媒介子轻于$30\\,\mathrm{meV}/c^2$的情况，我们在95%置信水平下排除了低至$\alpha_n = 3.2\times 10^{-9}$的耦合，并对复合暗物质的暗物质-中子截面设定了领先约束。我们的结果使悬浮传感的质量探测范围较光悬浮扩展了7个数量级，进入超重暗物质前沿领域。
英文摘要
We present the first search for ultraheavy dark matter using a magnetically levitated particle. The POLONAISE experiment uses a milligram-scale ferromagnet levitated in a superconducting trap, admitting a force sensitivity of $0.07\,\mathrm{fN\,Hz^{-1/2}}$ and resolving impulses as small as $1\,\mathrm{TeV}/c$. Treating every candidate impulse as a possible dark matter event, we set optimum-interval upper limits on the neutron coupling $α_n$ for dark matter interacting through a new light mediator. For dark matter masses $10^6\,\mathrm{GeV}/c^2\text{-}10^{15}\,\mathrm{GeV}/c^2$ and mediators lighter than $30\,\mathrm{meV}/c^2$, we exclude couplings as low as $α_n = 3.2\times 10^{-9}$ at $95\%$ confidence level and set leading constraints on the dark matter-neutron cross section for composite dark matter. Our results extend levitated sensing beyond the mass reach of optical levitation by seven orders of magnitude into the ultraheavy dark matter frontier.
Comments6 pages, 6 appendices, 6 figures
