从LZ核反冲到费米-LAT伽马射线的TeV希格斯ino暗物质
TeV Higgsino Dark Matter from LZ Nuclear Recoil to Fermi-LAT Gamma Rays
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中文总结 AI 辅助
该研究证实最小超对称标准模型的TeV希格斯ino暗物质可解释LZ核反冲超出与费米-LAT银心数据偏好，结合冰立方约束确定参数空间，其信号可被H.E.S.S.及未来CTAO检验。
中文摘要 AI 辅助
最小超对称标准模型中的希格斯ino暗物质是最极简、最经典的弱相互作用大质量粒子候选者之一。我们证明这一经典候选者可同时解释LZ实验报告的高能核反冲超出事例，以及费米-LAT14年银心数据的温和偏好，遗迹丰度将希格斯ino暗物质质量限定在约1.1TeV，反冲谱则选出数百keV的质量分裂。结合10年冰立方太阳中微子约束，希格斯ino解释进一步确定了可行的参数空间区域，其预测的银心伽马射线线与端点信号接近当前H.E.S.S.灵敏度，且在CTAO的预计探测范围内，使这一经典候选者在近期可被检验。
英文摘要
The excess of high-energy nuclear recoils, which was recently reported by the LUX-ZEPLIN (LZ) experiment, together with the Fermi-LAT Galactic-Center preference, suggests new physics beyond the standard model (SM). One of the minimal extensions of the SM is to introduce a fermionic electroweak doublet in which the lightest neutral component can play the role of a stable dark matter particle. We show that the minimal higgsino dark matter can offer a common origin for both excesses. The inferred mass splitting, however, depends on the local dark matter velocity distribution, and including the high-velocity tail generated by the gravitational influence of the Large Magellanic Cloud yields $δ_m =481$--$519~\mathrm{keV}$ for $m_χ=1000$--$1183~\mathrm{GeV}$ at $1σ$ level. Near elastic-scattering blind spots, solar-captured higgsinos fail to reach thermal equilibrium, weakening their annihilation signal, so that ten years of IceCube data exclude $δ_m \lesssim 475~\mathrm{keV}$ at 90% C.L. The viable parameter space can be tested through the associated gamma-ray line, which is within the projected reach of CTAO.
发表机构
- Nanjing Normal University（南京师范大学）
- Henan Normal University（河南师范大学）
- Yantai University（烟台大学）
机构由 AI 辅助整理，请以论文原文为准。
