发表机构
Zhengzhou University; Henan Normal University（郑州大学; 河南师范大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究评估LZ-2024数据对MSSM中轻Bino-like中性ino暗物质的约束，通过单圈修正和FLAG-2024核子矩阵元计算散射截面，发现两种共振情景被以超过5.9σ和4.1σ的显著性排除。
AI 中文摘要
在具有重sfermion的最小超对称标准模型中，一个亚百GeV的Bino-like中性ino仅能通过$h$-或$Z$-共振湮灭来热学地达到观测到的暗物质丰度。由于控制这些共振的耦合同时决定了与核子的自旋无关和自旋相关的散射，重现relic密度对散射截面施加了不可约的下包络线。我们评估了这些界限，包括对这些顶点的完整单圈修正，这些修正分别将直接探测率提高了高达$50\\%$和$30\\%$，采用了FLAG-2024核子矩阵元及其最不利的$3\sigma$偏移，并将预测与基于似然法的LZ数据重铸进行了对比。我们发现，LZ-2024结果以保守的单侧显著性分别超过$5.9\sigma$和$4.1\sigma$排除了两种共振情景，无论中性ino构成全部还是仅部分暗物质，且独立于LHC电弱ino搜索。
英文摘要
In the Minimal Supersymmetric Standard Model with heavy sfermions, a sub-hundred-GeV Bino-like neutralino can thermally achieve the observed dark matter abundance only through $h$- or $Z$-resonant annihilation. Since the couplings governing these resonances simultaneously determine the spin-independent and spin-dependent scattering off nucleons, reproducing the relic density imposes irreducible lower envelopes on the scattering cross sections. We evaluate these bounds including the complete one-loop corrections to these vertices, which enhance the direct-detection rates by up to $50\%$ and $30\%$, respectively, adopt the FLAG-2024 nucleon matrix elements with their most adverse $3σ$ shifts, and confront the predictions with a likelihood-based recast of the LZ data. We find that the LZ-2024 results exclude both resonant scenarios at conservative one-sided significances exceeding $5.9σ$ and $4.1σ$, respectively, irrespective of whether the neutralino constitutes all or only part of the dark matter, and independently of LHC electroweakino searches.
Comments13 pages, 7 figures, and 1 table
