GmSUGRA中的热Higgsino暗物质与LZ事件及太阳中微子约束
Thermal Higgsino Dark Matter in GmSUGRA for the LZ Event and Solar-Neutrino Constraint
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中文总结 AI 辅助
本研究在GmSUGRA框架下探讨热Higgsino暗物质，发现LZ事件偏好的亚MeV劈裂可动态实现，且与太阳中微子约束共同选择同一分支的不同区域。
中文摘要 AI 辅助
我们研究了在LUX-ZEPLIN实验报告的高反冲事件以及随后从IceCube数据推断的太阳中微子限制之后，具有广义最小超引力（GmSUGRA）边界条件的最小超对称标准模型（MSSM）中的热Higgsino暗物质。Higgs扇区采用NUHM2型参数化实现，以$\mu$和$m_A$作为输入，而超对称破缺软项服从非普适的GmSUGRA关系。数值扫描包含一个与普朗克数据兼容的、接近热质量的Higgsino分支，其中中性态劈裂从几百keV区域连续延伸至MeV尺度。该分支中$\dmchi\simeq0.3$–$0.4$ MeV的部分与LZ事件相关的运动学区间重叠，但被当前对全密度热Higgsino的太阳俘获重新解释所不利。相同的高尺度分支在更大的劈裂下持续存在，包括$\dmchi\simeq0.85$、$1.10$和$1.34$ MeV的代表性谱，超出了所引用的太阳俘获限制。我们的结果表明，LZ高反冲解释所青睐的质量和亚MeV劈裂可以在GUT动机的超对称构造中动态实现，而无需将中性态压缩作为弱尺度输入。因此，组合数据选择了共同的GmSUGRA Higgsino分支的不同部分，而非排除热Higgsino构造本身。
英文摘要
We study the thermal Higgsino dark matter in the Minimal Supersymmetric Standard Model (MSSM) with Generalized Minimal Supergravity (GmSUGRA) boundary conditions after the high-recoil event reported by the LUX--ZEPLIN experiment and the subsequent solar-neutrino limits inferred from IceCube data. The Higgs sector is implemented in a NUHM2-type parametrization with $μ$ and $m_A$ as inputs, while the supersymmetry breaking soft terms obey the non-universal GmSUGRA relations. The numerical scan contains a Planck-compatible Higgsino branch near the thermal mass, with the neutral-state splitting extending continuously from the few-hundred-keV region to the MeV scale. The part of this branch with $\dmchi\simeq0.3$--$0.4$ MeV overlaps the kinematic interval relevant to the LZ event, but is disfavored by the current solar-capture reinterpretations for a full-density thermal Higgsino. The same high-scale branch persists at larger splittings, including representative spectra with $\dmchi\simeq0.85$, $1.10$, and $1.34$ MeV, beyond the quoted solar-capture limits. Our results demonstrate that the mass and sub-MeV splitting favored by the LZ high-recoil interpretation can be realized dynamically within a GUT-motivated supersymmetric construction, without imposing the neutralino compression as a weak-scale input. The combined data therefore select different parts of a common GmSUGRA Higgsino branch rather than excluding the thermal Higgsino construction itself.
发表机构
- Zhejiang Normal University（浙江师范大学）
- Khazar University（阿塞拜疆大学）
- Hubei Polytechnic University（湖北理工学院）
- Henan Normal University（河南师范大学）
- Federal Urdu University of Arts, Science and Technology（联邦乌尔都艺术、科学与理工大学）
- CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences（中国科学院理论物理研究所理论物理重点实验室）
- University of Chinese Academy of Sciences（中国科学院大学）
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