论文标题
低质量暗物质项目的简介，雷神：暗物质中的液体氦时间投影室
Introduction to a low-mass dark matter project, ALETHEIA: A Liquid hElium Time projection cHambEr In dArk matter
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。大量的天文学和宇宙学观察已经确定了DM存在于宇宙，银河系和太阳系中。但是，使用基本物理学的语言了解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。 WIMP是讨论最多的DM候选者。经过数十年的狩猎，令人信服的通过wimps信号仍然很大。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 $）尚未完全利用。通过将最干净的散装材料填充到田间最有竞争力的探测器中，TPC可以实现极低的背景；因此，为了帮助回答当今最紧迫的物理问题之一：DM的性质。在本文中，我们简要介绍了低质量DM的物理动机，Aletheia探测器的设计，可用于DM搜索的可能分析渠道以及自2020年夏季推出以来我们取得的进展。
Dark Matter (DM) is one of the most critical questions to be understood and answered in fundamental physics today. Plenty of astronomical and cosmological observations have already pinned down that DM exists in the Universe, the Milky Way, and the Solar System. However, understanding DM with the language of elementary physics is still in progress. DM direct detection tests the interactive cross-section between galactic DM particles and an underground detector's nucleons. WIMPs is the most discussed DM candidate. After decades of hunting, a convincing WIMPs signal is still at large. Relatively, the low-mass WIMPs region ($\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$^2$). By filling the arguably cleanest bulk material, LHe, into the arguably most competitive detector in the field, TPCs, ALETHEIA is supposed to achieve an extremely low-level background; therefore, to help answer one of the most pressing physical questions today: the nature of DM. In this paper, we briefly go through the physics motivation of low-mass DM, the ALETHEIA detector's design, possible analysis channels available for DM searches, and the progress we have made since the project launched in the summer of 2020.
