A sterile neutrino is a well motivated minimal new physics model that leaves an imprint in neutrino oscillations. Over the last two decades, a number of hints pointing to a sterile neutrino have emerged, many of which are pointing near $m_4\sim 1\mathrm{eV}$. Here, we show how MicroBooNE data can be used to search for electron neutrino disappearance using each of their four analysis channels. We find a hint for oscillations with the highest single channel significance of $2.4\sigma$ (using the Feldman-Cousins approach) coming from the Wire-Cell analysis and a simplified treatment of the experimental systematics. The preferred parameters are ${\sin }^2(2{\theta }_{14})=0.35_{-0.16}^{+0.19}$ and $\mathrm{\Delta }{m}_{41}^2=1.25_{-0.39}^{+0.74}{\mathrm{eV}}^2$. This region of parameter space is in good agreement with existing hints from source experiments, is at a similar frequency but higher mixing than indicated by reactor antineutrinos, and is at the edge of the region allowed by solar neutrino data. Existing unanalyzed data from MicroBooNE could increase the sensitivity to the $>3\sigma$ level.

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使用 MicroBooNE 的电子中微子消失数据进行无菌中微子搜索

无菌中微子是一种动机良好的最小新物理模型，它在中微子振荡中留下了印记。在过去的二十年里，出现了许多指向不育中微子的线索，其中许多都指向附近${米}_4～1\mathrm{电子伏特}$. 在这里，我们展示了如何使用 MicroBooNE 数据使用它们的四个分析通道中的每一个来搜索电子中微子的消失。我们找到了具有最高单通道显着性的振荡提示$2.4\sigma$（使用 Feldman-Cousins 方法）来自 Wire-Cell 分析和实验系统学的简化处理。首选参数是${罪}^2(2{\theta }_{14})=0.35_{-0.16}^{+0.19}$和$\mathrm{\Delta }{米}_{41}^2=1.25_{-0.39}^{+0.74}{\mathrm{电子伏特}}^2$. 该参数空间区域与来自源实验的现有提示非常吻合，与反应堆反中微子显示的频率相似但混合更高，并且位于太阳中微子数据允许的区域边缘。来自 MicroBooNE 的现有未分析数据可能会增加对$>3\sigma$等级。