Results of direct dark matter detection with CDEX experiment at CJPL

Abstract

The China Dark Matter Experiment (CDEX), located at the China Jinping Underground Laboratory (CJPL) whose overburden is about 2400m rock, aims at direct searches of light Weakly Interacting Massive Particles (WIMPs). A single-element 994-gram p-type point contact (PPC) germanium detector (CDEX-1B) runs inside a solid passive shielding system. To achieve lower background, a prototype 10kg PPC germanium detector array (CDEX-10), consisting of three detector strings with three germanium crystals each, is directly immersed in the liquid nitrogen. With the energy threshold of 160eV, the limits on WIMP-nucleus scattering are set by energy spectra and annual modulation analysis, respectively. Incorporating Migdal effect, the data of CDEX-1B are re-analyzed to search sub-GeV WIMPs. Finally, the future plan of CDEX experiment in CJPL-II is introduced.

arXiv commentfor the TAUP2019 proceedings at Journal of Physics: Conference Series

References in corpus (16)

• Final model independent result of DAMA/LIBRA-phase1
• CoGeNT: A Search for Low-Mass Dark Matter using p-type Point Contact Germanium Detectors
• Annual Modulation of Dark Matter: A Review
• Migdal Effect in Dark Matter Direct Detection Experiments
• The Large Enriched Germanium Experiment for Neutrinoless Double Beta Decay (LEGEND)
• Constraints on Spin-Independent Nucleus Scattering with sub-GeV Weakly Interacting Massive Particle Dark Matter from the CDEX-1B Experiment at the China Jin-Ping Laboratory
• Limits on Light Weakly Interacting Massive Particles from the First 102.8 kg $\times$ day Data of the CDEX-10 Experiment
• The China Jinping Underground Laboratory and its Early Science
• Limits on light WIMPs from the CDEX-1 experiment with a p-type point-contact germanium detector at the China Jingping Underground Laboratory
• Introduction of the CDEX experiment
• First results on low-mass WIMP from the CDEX-1 experiment at the China Jinping underground Laboratory
• A Search of Low-Mass WIMPs with p-type Point Contact Germanium Detector in the CDEX-1 Experiment
• Search for Light Weakly-Interacting-Massive-Particle Dark Matter by Annual Modulation Analysis with a Point-Contact Germanium Detector at the China Jinping Underground Laboratory
• Limits on light WIMPs with a 1 kg-scale germanium detector at 160 eVee physics threshold at the China Jinping Underground Laboratory
• Search for An Annual Modulation in Three Years of CoGeNT Dark Matter Detector Data
• Study of ${\rm Y}$ production in $p$Pb collisions at $\sqrt{s_{NN}}=8.16$ TeV

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• First measurement of the nuclear-recoil ionization yield in silicon at 100 eV
• Dark Matter Direct Detection with Quantum Dots
• Identification of the anomalous fast bulk events in a p-type point contact germanium detector
• In-situ gamma-ray background measurements for next generation CDEX experiment in the China Jinping Underground Laboratory