用PandaX-II资料寻找太阳轴子和中微子磁矩
A search for solar axions and anomalous neutrino magnetic moment with the complete PandaX-II data
摘要：
根据XENON 1 T最近报道的事件过量，我们报告了在PandaX-II的完整数据集中使用低能电子反冲事件寻找新的物理信号。这些数据对应于100.7吨-天的液体氙总暴露量。通过对主要背景谱的稳健估计，我们对具有增强磁矩的太阳轴子和中微子进行了灵敏的搜索。在90%的置信水平下，我们发现当轴子质量小于$\rm 0.1~keV/c^2$时，轴子-电子耦合$g_{Ae}<4.6\times 10^{-12}$和中微子磁矩$μ_ν<4.9\times 10^{-11}μ_{B}$都满足。从XENON 1 T观察到的过量在我们的实验限制范围内。
英文摘要：
We report a search for new physics signals using the low energy electron recoil events in the complete data set from PandaX-II, in light of the recent event excess reported by XENON1T. The data correspond to a total exposure of 100.7 ton-day with liquid xenon. With robust estimates of the dominant background spectra, we perform sensitive searches on solar axions and neutrinos with enhanced magnetic moment. We find that the axion-electron coupling $g_{Ae}<4.6\times 10^{-12}$ for an axion mass less than $\rm 0.1~keV/c^2$ and the neutrino magnetic moment $μ_ν<4.9\times 10^{-11}μ_{B}$ at 90% confidence level. The observed excess from XENON1T is within our experimental constraints.
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