论文标题
雷神：使用液态氦TPC寻找低质量暗物质
ALETHEIA: Hunting for Low-mass Dark Matter with Liquid Helium TPCs
论文作者
论文摘要
暗物质（DM）是当今基本物理学中要理解和回答的最关键问题之一。具有多样化的天文学和宇宙学技术的观察强烈表明，DM存在于宇宙，银河系和太阳系中。然而，在基础物理学语言下了解DM仍在进行中。 DM直接检测测试了银河系DM颗粒与地下检测器的核子之间的互动横截面。尽管较弱的互动式质量颗粒（WIMP）是最讨论的DM候选者，但该领域最具说服力的实验一直在解决无数结论。相对而言，与高质量wimps（$ \ sim $ \ sim $ 10 Gev/c $^2 $ -10 tev/c $^2 $）相比，低质量wimps区域（$ \ sim $ 10 mev/c $^2 $ -10 GEV/C $^2 $）尚未完全利用。雷神（暗物质中的液态氦时间投影室）实验旨在用充满液氦的TPC（时间投影室）来寻找低质量的wimps。在本文中，我们介绍了该项目的物理动机，探测器的设计，R \＆D计划以及自2020年夏季启动以来我们取得的进步。
Dark Matter (DM) is one of the most critical questions to be understood and answered in fundamental physics today. Observations with varied astronomical and cosmological technologies strongly indicated that DM exists in the Universe, the Milky Way, and the Solar System. Nevertheless, understanding DM under the language of elementary physics is still in progress. DM direct detection tests the interactive cross-section between galactic DM particles and an underground detector's nucleons. Although Weakly Interactive Massive Particles (WIMPs) are the most discussed DM candidates, the null-WIMPs conclusion has been consistently addressed by the most convincing experiments in the field. Relatively, the low-mass WIMPs region ($\sim$ 10 MeV/c$^2$ - 10 GeV/c$^2$) has not been fully exploited compared to high-mass WIMPs ($\sim$ 10 GeV/c$^2$ - 10 TeV/c$^2$). The ALETHEIA (A Liquid hElium Time projection cHambEr In dArk matter) experiment aims to hunt for low-mass WIMPs with liquid helium-filled TPCs (Time Projection Chambers). In this paper, we go through the physics motivation of the project, the detector's design, the R\&D plan, and the progress we have made since the project has been launched in the summer of 2020.
