发表机构
Tokyo Metropolitan University（东京都立大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究将LZ的248 keV类核反冲解释为1.08 TeV热希格斯ino暗物质的近阈值上散射，利用PQ对称高尺度超对称模型解决多个粒子物理问题，可放松H.E.S.S.对混合暗物质的限制。
AI 中文摘要
LZ合作组报道的248 keV类核反冲事件可被解释为1.08 TeV热希格斯ino暗物质的近阈值上散射。中性希格斯ino的劈裂量级为0.3–0.35 MeV，使固定的弱相互作用截面接近LZ观测到的区间，并暗示电弱gauginos的量级为O(10^7) GeV。该能谱与引力介导的高尺度超对称及Kim-Nilles佩奇-奎因（Peccei–Quinn，PQ）区兼容。尽管预测的大统一（GUT）尺度低于常规值，但高超对称尺度抑制了质子衰变，同时解决了常规的CP、味、gravitino及模问题，未来或可探测到质子衰变。PQ对称性将希格斯ino质量压低至超对称尺度以下，还产生了解决强CP问题的QCD轴子。若轴子与希格斯ino构成混合暗物质，可放松依赖晕轮廓的H.E.S.S.限制。
英文摘要
The 248-keV nuclear-recoil-like event reported by LZ can be interpreted as near-threshold upscattering of 1.08-TeV thermal Higgsino dark matter. A neutral-Higgsino splitting of order $0.3$--$0.35$ MeV places the fixed weak-interaction cross section close to the observed LZ interval and implies electroweak gauginos at ${O}(10^7)$ GeV. This spectrum is compatible with gravity-mediated high-scale supersymmetry and a Kim--Nilles Peccei--Quinn sector. Although the GUT scale is predicted to be lower than the conventional one, proton decay is suppressed due to the high SUSY scale which also solves the conventional CP, flavor, gravitino and moduli problems. Indeed, proton decay may be probed in the future. The PQ symmetry lowers the Higgsino mass below the SUSY scale and also yields a QCD axion that solves the strong-$CP$ problem. If the axion and Higgsino constitute mixed dark matter, the halo-profile-dependent H.E.S.S. limit can be relaxed.
Comments5 pages, 2 figure, 1 Table
