LUX-ZEPLIN 通往 Hea$\ u$en 的阶梯：太阳俘获暗物质弹性散射的限制
LUX-ZEPLIN's Stairway to Hea$ν$en: limits on elastic scatters of dark matter from solar capture
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- Indian Institute of Science（印度科学学院）
- Stockholm University（斯德哥尔摩大学）
- The Oskar Klein Centre for Cosmoparticle Physics（奥斯卡·克莱因宇宙粒子物理中心）
- Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University（特拉维夫大学雷蒙德和贝弗利·萨克勒物理与天文学学院）
- Department of Physics and Astronomy, University of California - Irvine（加州大学欧文分校物理与天文学系）
- Saha Institute of Nuclear Physics（萨哈核物理研究所）
- Homi Bhabha National Institute（霍米·巴巴国立研究所）
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中文总结 AI 辅助
本研究利用LZ实验的250 keV氙反冲事件，通过反推Wilson系数估计太阳俘获暗物质速率，并结合IceCube和Super-Kamiokande中微子数据，排除了弱标度附近宽范围暗物质质量，最强限制来自直接湮灭到中微子末态。
中文摘要 AI 辅助
最近，LUX-ZEPLIN（LZ）暗物质直接探测实验报告了氙原子核以约 250 keV 能量反冲的事件，合作组将其解释为动量依赖的弹性散射或非弹性散射。在本研究中，我们选取 LZ 列出的、拟合该数据优于 3σ 的弹性算子，并利用所报告的显著性进行对数似然分析，以反推其最佳拟合的 Wilson 系数。随后，我们估计每种算子对应的暗物质在太阳中被俘获的速率，并假设被俘获的暗物质自湮灭为 IceCube 所研究的标准末态，从而利用 IceCube 和 Super-Kamiokande 对太阳方向及大气中微子通量的测量结果对这些算子设置限制。我们表明，在弱标度附近、能够解释 LZ 事件的宽范围暗物质质量在此情景下被排除，其中直接湮灭到中微子-反中微子末态给出的限制最强。
英文摘要
The recent report of xenon recoiling with about 250 keV energy at the LUX-ZEPLIN (LZ) dark matter direct detection experiment was interpreted by the collaboration as either a momentum-dependent elastic scatter or an inelastic scatter. In this study, we take elastic operators listed by LZ that fit the datum to better than 3$σ$, and perform a log-likelihood analysis using the reported significances to reverse-engineer their best-fit Wilson coefficients. We then estimate for each operator the rate of dark matter capturing in the Sun, and assuming self-annihilations of the captured population to various Standard Model final states studied by IceCube, we place limits on them from measurements at IceCube and Super-Kamiokande of the fluxes of solar-direction and atmospheric neutrinos. We show that large ranges of dark matter masses around the weak scale that explain the LZ event are ruled out in this scenario, with the strongest limits placed by direct annihilations to neutrino-antineutrino final states.
