标题： 搜索带有中微子望远镜的U(1)$_{L_μ-L_τ}$电荷暗物质 显示英文标题

标题： Search for U(1)$_{L_μ-L_τ}$ charged Dark Matter with neutrino telescope

摘要： 我们研究了U(1)$_{L_\mu-L_\tau}$理论中的一个简单的狄拉克费米子暗物质模型。 新的轻规范玻色子$X$在暗物质物理和解释缪子$g-2$异常中起着重要作用。 通过一个大的U(1)$_{L_\mu-L_\tau}$电荷实现了观测到的暗物质残留密度，而无需引入$X$玻色子的共振效应。 作为该模型的副产品，根据质量谱预测了来自亚GeV暗物质$\psi$的特征中微子信号。 我们以与模型无关的方式对$\psi\bar\psi\to \nu\bar\nu$以及$\psi\bar\psi\to XX$后的$X\to\nu\bar\nu$进行分析。 前一过程中的中微子能谱是单色的，而后一过程中的中微子能谱是碗状的。 我们还评估了在超级神冈探测器和未来的Hyper-Kamiokande探测器上的灵敏度。 该分析最终应用于U(1)$_{L_\mu-L_\tau}$暗物质模型。 显示英文摘要

摘要： We study a simple Dirac fermion dark matter model in U(1)$_{L_\mu-L_\tau}$ theory. The new light gauge boson $X$ plays important roles in both dark matter physics and the explanation for the muon $g-2$ anomaly. The observed dark matter relic density is realized by a large U(1)$_{L_\mu-L_\tau}$ charge without introducing a resonance effect of the $X$ boson. As a by-product of the model, characteristic neutrino signatures from sub-GeV dark matter $\psi$ are predicted depending on the mass spectrum. We formulate the analysis of $\psi\bar\psi\to \nu\bar\nu$, and of $\psi\bar\psi\to XX$ followed by $X\to\nu\bar\nu$, in a model independent way. The energy spectrum of neutrinos in the former process is monochromatic while in the latter process is bowl-shape. We also evaluate sensitivity at Super-Kamiokande and future Hyper-Kamiokande detectors. The analysis is finally applied to the U(1)$_{L_\mu-L_\tau}$ dark matter model.