第二届地下和空间粒子物理与宇宙物理前沿问题研讨会

Session

分会报告（实验2）

9 May 2023, 14:00

Conveners

分会报告（实验2）

• 马 豪

69. Search for light dark matter with ionization signals in the PandaX-4T Experiment

李 帅杰 (Tsung-Dao Lee Institute, Shanghai Jiao Tong University)

09/05/2023, 14:00

We report the search results of light dark matter through its interactions with shell electrons and nuclei, using the commissioning data from the PandaX-4T liquid xenon detector. Low energy events are selected to have an ionization-only signal between 60 to 200 photoelectrons, corresponding to a mean nuclear recoil energy from 0.77 to 2.54 keV and electronic recoil energy from 0.07 to 0.23...

81. 基于CDEX-10实验的轻质量奇异暗物质搜寻

代 文翰

09/05/2023, 14:20

直接探测实验长期的搜寻至今没有发现WIMP暗物质信号，对GeV/$c^2$以下质量区间的轻质量暗物质的探测逐渐成为暗物质研究的热点。CDEX合作组利用在中国锦屏地下实验室（CJPL）运行的CDEX-10实验205 kg·day曝光量数据，通过两种新近提出的轻质量暗物质与核子的相互作用方式：费米子暗物质-核子中性流吸收反应（$\chi+N\to N+\nu$）和暗物质-核子3→2非弹性散射反应（$\chi+\chi+N\to N+\phi$）对轻质量奇异暗物质进行进行搜寻。搜寻结果将对暗物质核子反应截面的限制推进到了10 MeV/$c^2$左右的轻质量区间，给出了当前直接探测实验已发表结果中对最低质量暗物质反应截面的限制。

95. Studies on Core-collapse Supernova Neutrino at JUNO

黄 鑫

09/05/2023, 14:40

The Jiangmen Underground Neutrino Observatory (JUNO) uses a 20,000-ton liquid scintillator detector to study various aspects of neutrino physics, including the study of neutrinos from supernovae. Thanks to JUNO's large target mass and low energy threshold, it can observe supernova and pre-supernova neutrinos through multiple reaction channels with high statistics. For example, in a typical...

77. Simulations, background and sensitivity estimations for the NvDEx experiment

Emilio Ciuffoli (IMP, CAS)

09/05/2023, 15:00

I will present the results of the background simulations for the NvDEx experiment. The main sources of background are gamma's and fast neutrons from natural radioactivity as well as cosmogenic-induced activation of nuclei in the materials of the detector.
Gamma's coming from the decay of radioactive contaminations in the materials of the detector will be the main source of background, however...

104. Cosmogenic background simulation and measurement for Mo100-based bolometric experiment at CJPL

陈 伟

09/05/2023, 15:20

The cosmogenic background is the most important source of the background of the $0\nu\beta\beta$ decay search experiment. After being produced and transformed at the surface, there are several different cosmogenic radionuclides in the LMO crystals and shielding materials that will affect the background level of the $0\nu\beta\beta$ decay search experiment and dark matter search experiment.
We...