Exotic Dark Matter Search with CDEX-10 Experiment at China's Jinping Underground Laboratory

Abstract

A search for exotic dark matter (DM) in the sub-GeV mass range has been conducted using 205 kg$\cdot$day data taken from a p-type point contact germanium detector of CDEX-10 experiment at China Jinping underground laboratory. New low-mass dark matter searching channels, neutral current fermionic DM absorption ($\chi +A\to \nu +A$) and DM-nucleus 3$\to$2 scattering ($\chi +\chi +A\to \varphi +A$), have been analyzed with an energy threshold of 160 eVee. No significant signal was found. Thus new limits on the DM-nucleon interaction cross section are set for both models at sub-GeV DM mass region. A cross section limit for the fermionic DM absorption is set to be $2.5\times 10^{-46}\mathrm{c}{\mathrm{m}}^2$(90\% C.L.) at DM mass of 10 MeV/c${}^2$. For the DM-nucleus 3$\to$2 scattering scenario, limits are extended to DM mass of 5 MeV/c${}^2$ and 14 MeV/c${}^2$ for the massless dark photon and bound DM final state, respectively.

5 pages, 7 figures

References in corpus (9)

• Results from a search for dark matter in the complete LUX exposure
• Bosonic super-WIMPs as keV-scale dark matter
• Current status of direct dark matter detection experiments
• The China Jinping Underground Laboratory and its Early Science
• Dark-matter bound states from Feynman diagrams
• Limits on light WIMPs from the CDEX-1 experiment with a p-type point-contact germanium detector at the China Jingping Underground Laboratory
• Measurement of the low-energy quenching factor in germanium using an ${}^{88}$Y/Be photoneutron source
• First search for the absorption of fermionic dark matter with the PandaX-4T experiment
• Dark magnetic dipole property in fermionic absorption by nucleus and electrons

Cited by in corpus (11)

• NGC 1068 constraints on neutrino-dark matter scattering
• Searches for exotic spin-dependent interactions with spin sensors
• Experimental Limits on Solar Reflected Dark Matter with a New Approach on Accelerated-Dark-Matter-Electron Analysis in Semiconductors
• Projected WIMP sensitivity of the CDEX-50 dark matter experiment
• Probing Dark Matter Particles from Evaporating Primordial Black Holes via Electron Scattering in the CDEX-10 Experiment
• Performance of the 1-ton Prototype Neutrino Detector at CJPL-I
• Incoherent Fermionic Dark Matter Absorption with Nucleon Fermi Motion
• Weak Lensing Constraints on Dark Matter-Baryon Interactions with $N$-Body Simulations and Machine Learning
• Constraints on inelastic dark matter from the CDEX-1B experiment
• Absorption of Fermionic Dark Matter in the PICO-60 C${}_3$F${}_8$ Bubble Chamber
• Constraints on Fermionic Dark Matter Absorption from Radiochemical Solar-Neutrino Measurements