Constraints on ultraheavy dark matter from the CDEX-10 experiment at the China Jinping Underground Laboratory
Y. F. Wang, L. T. Yang, Q. Yue, K. J. Kang, Y. J. Li, H. P. An, Greeshma C., J. P. Chang, H. Chen, Y. H. Chen, J. P. Cheng, J. Y. Cui, W. H. Dai, Z. Deng, Y. X. Dong, C. H. Fang, H. Gong, Q. J. Guo, T. Guo, X. Y. Guo, L. He, J. R. He, H. X. Huang, T. C. Huang, S. Karmakar
TL;DR
This study searches for ultraheavy dark matter using the CDEX-10 detector, setting new constraints on its properties by analyzing data with a detailed simulation framework.
Contribution
It introduces a Monte Carlo simulation incorporating Earth shielding effects to constrain UHDM-nucleon interactions with solid-state detectors.
Findings
No excess above background was observed in the data.
The study excludes UHDM-nucleon scattering cross sections for masses from 10^6 to 10^{11} GeV.
Provides the most stringent constraints below 10^8 GeV using solid-state detectors.
Abstract
We report a search for ultraheavy dark matter (UHDM) with the CDEX-10 experiment at the China Jinping Underground Laboratory. Using a Monte Carlo framework that incorporates Earth shielding effects, we simulated UHDM propagation and energy deposition in p-type point-contact germanium detectors. Analysis of 205.4 kgday exposure in the 0.16--4.16 keVee range showed no excess above background. Our results exclude the spin-independent UHDM-nucleon scattering with two cross section scales, with the UHDM mass from to GeV, and provide the most stringent constraints with solid-state detectors below GeV.
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