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arXiv 2304.06142hep-exphysics.ins-det
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液氙的核反冲响应及其对太阳 8B 中微子和暗物质搜寻的影响

Nuclear recoil response of liquid xenon and its impact on solar 8B neutrino and dark matter searches

X. Xiang, R. J. Gaitskell, R. Liu, J. Bang, J. Xu, W. H. Lippincott, J. Aalbers, J. E. Y. Dobson, M. Szydagis, G. R. C. Rischbieter, N. Parveen, D. Q. Huang, I.… 展开作者

X. Xiang, R. J. Gaitskell, R. Liu, J. Bang, J. Xu, W. H. Lippincott, J. Aalbers, J. E. Y. Dobson, M. Szydagis, G. R. C. Rischbieter, N. Parveen, D. Q. Huang, I. Olcina, R. J. James, J. A. Nikoleyczik

AI总结:

本文提出利用已发表刻度数据量化液氙低能核反冲响应不确定性的方法,并评估其对太阳 8B 中微子搜寻和低质量暗物质灵敏度的影响,指出忽略产额不确定性会使 6 GeV/c^2 WIMP 限制偏乐观约 2 倍。

摘要:

了解液氙(LXe)对核反冲的电离和闪烁响应对于基于液氙的暗物质实验至关重要。当前的刻度在低于约 3 keV_nr 的低能区存在较大不确定性,而质量小于 10 GeV/c^2 的暗物质粒子信号正预期出现在该区域。太阳 8B 中微子产生的相干弹性中微子-核散射(CEνNS)也会在 3.0 keV_nr 以下形成连续的核反冲事件谱(占事件的 99%),这进一步使液氙实验中的低质量暗物质搜寻复杂化。本文描述了一种利用已发表的刻度数据来量化低能液氙响应不确定性的方法,并通过案例研究评估了在典型吨级液氙实验中产额不确定性对 8B 搜寻和低质量暗物质灵敏度的影响。我们得出结论:对于 6 GeV/c^2 的 WIMP 质量,若天真地忽略产额不确定性,将导致限制过于乐观,偏差约为 2 倍。未来的核反冲光产额刻度可使实验恢复这一灵敏度,同时提高太阳 8B 通量测量的准确性。

英文摘要:

Knowledge of the ionization and scintillation responses of liquid xenon (LXe) to nuclear recoils is crucial for LXe-based dark matter experiments. Current calibrations carry large uncertainties in the low-energy region below $\sim3$ keV$_nr$ where signals from dark matter particles of $<$10 GeV/c$^2$ masses are expected. The coherent elastic neutrino-nucleus scattering (CE$ν$NS) by solar $^8$B neutrinos also results in a continuum of nuclear recoil events below 3.0 keV$_{nr}$ (99\% of events), which further complicates low-mass dark matter searches in LXe experiments. In this paper, we describe a method to quantify the uncertainties of low-energy LXe responses using published calibration data, followed by case studies to evaluate the impact of yield uncertainties on ${^8}$B searches and low-mass dark matter sensitivity in a typical ton-scale LXe experiment. We conclude that naively omitting yield uncertainties leads to overly optimistic limits by factor $\sim2$ for a 6 GeV/c$^2$ WIMP mass. Future nuclear recoil light yield calibrations could allow experiments to recover this sensitivity and also improve the accuracy of solar ${^8}$B flux measurements.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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