发表机构
Saha Institute of Nuclear Physics; Homi Bhabha National Institute; Kavli IPMU (WPI), UTIAS, University of Tokyo; South China Normal University; State Key Laboratory of Nuclear Physics and Technology, Institute of Quantum Matter, South China Normal University（萨哈核物理研究所; 霍米·巴巴国立研究所; 卡弗里宇宙起源与演化研究国际中心（WPI），东京大学宇宙射线研究所; 华南师范大学; 华南师范大学量子物质研究院，核物理与技术国家重点实验室）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文研究LZ实验248 keV核反冲事件的暗物质弹性散射解释，通过重铸ATLAS单喷注搜索首次给出动量依赖拉格朗日量的LHC约束，发现低于TeV质量参数空间被排除且难以探测。
AI 中文摘要
LUX-ZEPLIN（LZ）实验观测到的248 keV核反冲事件可能源于暗物质（DM）与核子的相互作用。我们研究弹性散射解释，重点关注对于某些暗物质质量产生3σ或更高局部显著性的拉格朗日量。我们确定了与LZ事件兼容的暗物质参数空间，并通过重铸基于139 fb^-1数据、在√s=13 TeV下ATLAS单喷注加缺失横动量搜索，评估其与对撞机约束的一致性。对于大多数有效相互作用，我们发现LHC约束排除了暗物质质量低于约TeV（受有效场论（EFT）有效性约束）的LZ事件暗物质解释。特别是，我们首次推导了包括L_{10}在内的几个显式动量依赖拉格朗日量的LHC约束。对于许多相互作用，这些约束足够强，以至于暗物质质量低于约TeV的相应参数空间即使未来的直接探测实验也可能难以探测。因此，我们的结果对LZ事件本身的解释之外具有更广泛的意义。
英文摘要
The 248 keV nuclear-recoil event observed by the LUX-ZEPLIN (LZ) experiment could potentially arise from dark matter (DM) interactions with nucleons. We investigate elastic scattering interpretation, focusing on Lagrangians that yield a local significance of $3σ$ or higher for some DM mass. We identify DM parameter space compatible with the LZ event and assess its consistency with collider constraints by recasting the ATLAS monojet plus missing-transverse-momentum search at $\sqrt{s}=13$ TeV, based on $139~\mathrm{fb}^{-1}$ of data. For most of the effective interactions, we find that LHC constraints exclude the DM interpretation of the LZ event for DM masses below $\lesssim\,$TeV subject to the effective field theory (EFT) validity. In particular, we derive, for the first time, LHC constraints on several explicit momentum-dependent Lagrangians, including $\mathcal{L}_{10}$. For many interactions, these constraints are sufficiently strong that the corresponding parameter space below DM mass $\lesssim\,$TeV may be challenging to probe even with future direct detection experiments. Our results, therefore, have broader implications beyond the interpretation of the LZ event itself.
Comments10 pages, 1 table, 3 captioned figures
