发表机构
Center for Theoretical Physics – a Leinweber Institute, Massachusetts Institute of Technology; Physics Department, Boston University; Department of Physics, Harvard University（麻省理工学院莱因韦伯理论物理中心; 波士顿大学物理系; 哈佛大学物理系）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究提出最小 R 对称超对称标准模型中的 sneutrino 暗物质可解释 LZ 实验的高能反冲事件，通过轻子数破坏项和单态混合规避约束，预测质量约 360 GeV。
AI 中文摘要
我们探索了最小 R 对称超对称标准模型中 sneutrino 暗物质模型，作为 LZ 实验近期观测到的高重建核反冲能量事件的可能解释。该模型能够以技术自然的方式解释中性态之间的小质量劈裂，这得益于破坏轻子数的项；重要的是，该模型不需要将其他超对称粒子的质量推至极高的能标。与额外单态态的混合抑制了与标准模型粒子的相互作用强度，这使得 sneutrino 能够规避来自太阳中俘获的湮灭暗物质搜索所得到的约束，并允许暗物质质量保持在 TeV 能标附近，同时仍可能解释 LZ 的结果。通常，sneutrino 会产生过多的暗物质，除非它们非常轻；我们考虑一个最小情景，其中通过共湮灭产生暗物质作为一种特定机制，预测暗物质质量约为 360 GeV。
英文摘要
We explore a model of sneutrino dark matter in the Minimal R-Symmetric Supersymmetric Standard Model as a possible interpretation of the recent event at LZ with high reconstructed nuclear recoil energy. This model can account for a small mass splitting between neutral states in a technically natural way due to terms which violate lepton number; importantly, this model does not require sending masses of other SUSY particles to an extremely high energy scale. Mixing with additional singlet states suppresses the interaction strength with standard model particles which allows the sneutrino to sneak around bounds obtained from searches for annihilating dark matter captured in the sun and allows the dark matter to remain near the TeV scale and still potentially account for the LZ results. Typically, sneutrinos produce too much dark matter unless they are very light; we consider a minimal scenario where production occurs through co-annihilation as one specific mechanism where the dark matter mass is predicted to be around $360$ GeV.
Comments6 pages, 2 figures
