第三届地下和空间粒子物理与宇宙物理前沿问题研讨会

DarkSide: a direct dark matter search project using liquid argon

9 May 2024, 17:00

20m

二楼第二会议厅

01 - 分会报告 02-1 - 暗物质直接/间接探测实验 02 - 暗物质直接/间接探测实验

Speaker

Yi Wang (IHEP)

Description

DarkSide run since mid-2015 a 50-kg-active-mass dual-phase argon Time Projection Chamber (TPC), filled with low radioactivity argon from an underground source and produced world-class results for both the low mass ($M_{WIMP}<20GeV/c^2$) and high mass ($M_{WIMP}>100GeV/c^2$) direct detection search for dark matter.The next stage of the DarkSide program will be new generation experiments involving a global collaboration named the Global Argon Dark Matter Collaboration (GADMC) from all the current argon based experiments. DarkSide-20k is designed as a 20-tonne fiducial mass dual-phase Liquid Argon TPC with SiPM-based cryogenic photosensors and is expected to be free of any instrumental background for an exposure of >200 tonne x year. Like its predecessor, DarkSide-20k will be housed at the INFN Gran Sasso underground laboratory (LNGS), and it is expected to attain a WIMP-nucleon cross-section exclusion sensitivity of $7.4\times {10}^{-48},c{m}^2$ for a WIMP mass of $1TeV/c^2$ in a 200 t yr exposure. DarkSide-LowMass is an ultimate low-mass dark matter search experiment optimized for low-threshold electron-counting measurements, with sensitivity to light dark matter explored across various potential energy thresholds and background rates. DarkSide-LowMass can achieve sensitivity to light dark matter down to the level of the solar neutrino fog for GeV-scale masses and significant sensitivity down to 10 MeV/c², considering the Migdal effect or interactions with electrons. CJPL-II is the candidate laboratory for constructing the DarkSide-LowMass experiment. This talk will provide the latest updates on the DarkSide-20k project and the prospects of the DarkSide-LowMass project.