论文标题
直接检测实验对中微子磁偶极矩的敏感性
Sensitivity of direct detection experiments to neutrino magnetic dipole moments
论文作者
论文摘要
有了大尺寸，暗物质直接检测实验对太阳中微子通量敏感。核后坐信号由$^8 $ B中微子诱导，而电子后坐力主要由PP通量产生。这两个过程的测量都为在低阈值的背景低阈值下测试中微子特性提供了机会。在本文中，我们研究了这些实验对中微子磁偶极矩的敏感性，假设有1、10和40吨活动体积（Xenon1t，Xenonnt和Darwin的代表），0.3 KeV和1 KEV阈值。我们表明，仅使用核后坐力测量值，一个40吨检测器就可以与Borexino，Texono和Gemma一样具有竞争力，其灵敏度为$ 8.0 \ times \ times 10^{-11} \，μ_b$，以$ 90 \％$ $ $ CL的数据收集一年后。电子后坐力测量值将使灵敏度的方式低于这些值，从而可以测试未经天体物理参数排除的区域。使用电子后坐数据并根据性能，同一检测器将能够在一年的数据获取一年的时间内以$ 90 \％$ cl的价格探索$ 4.0 \ times 10^{ - 12}μ_b$。通过假设在10年内运行的200吨液体氙气检测器，我们得出结论，这种类型的检测器的灵敏度将为$ 10^{ - 12} \，μ_b$。降低统计不确定性可能会提高敏感性以下。
With large active volume sizes dark matter direct detection experiments are sensitive to solar neutrino fluxes. Nuclear recoil signals are induced by $^8$B neutrinos, while electron recoils are mainly generated by the pp flux. Measurements of both processes offer an opportunity to test neutrino properties at low thresholds with fairly low backgrounds. In this paper we study the sensitivity of these experiments to neutrino magnetic dipole moments assuming 1, 10 and 40 tonne active volumes (representative of XENON1T, XENONnT and DARWIN), 0.3 keV and 1 keV thresholds. We show that with nuclear recoil measurements alone a 40 tonne detector could be as competitive as Borexino, TEXONO and GEMMA, with sensitivities of order $8.0\times 10^{-11}\,μ_B$ at the $90\%$ CL after one year of data taking. Electron recoil measurements will increase sensitivities way below these values allowing to test regions not excluded by astrophysical arguments. Using electron recoil data and depending on performance, the same detector will be able to explore values down to $4.0\times 10^{-12}μ_B$ at the $90\%$ CL in one year of data taking. By assuming a 200-tonne liquid xenon detector operating during 10 years, we conclude that sensitivities in this type of detectors will be of order $10^{-12}\,μ_B$. Reducing statistical uncertainties may enable improving sensitivities below these values.
