Constraints on Sub-GeV Dark Matter–Electron Scattering from the CDEX-10 Experiment

Zhang, Z. Y.; Yang, L. T.; Yue, Qian; Kang, K.; Li, Y. J.; Ağartıoğlu, M.; An, Haipeng; Cheng, Jianping; Chen, Y. H.; Cheng, J.; Dai, Wenhan; Deng, Zhi; Fang, C. H.; Geng, X. P.; Gong, H.; Guo, Q.; Guo, Xuyuan; He, Longzhuang; He, S.; Hu, Juan; Huang, Hanxiong; Huang, Tuchen; Jia, H. T.; Jiang, Xi; Li, H. B.; Li, J. M.; Li, J.; Li, Q. Y.; Li, R. M. J.; Li, X. Q.; Li, Y. L.; Liao, Bin; Lin, Shou-De; Liu, S. K.; Liu, Y. D.; Liu, Y.; Liu, Y. Y.; Liu, Z. Z.; Ma, Hui; Mao, Y.; Nie, Q. Y.; Ning, Jinhua; Pan, H.; Qi, Ningchun; Ren, Jie; Ruan, Xichao; Saraswat, Kapil; Sharma, V.; She, Z.; Singh, M. K.; Sun, Tao; Tang, C. J.; Tang, W. Y.; Tian, Yang; Wang, G. F.; Wang, L.; Wang, Q.; Wang, Y.; Wang, Y. X.; Wong, H. T.; Wu, Shiyong; Wu, Y. C.; Xing, Haoyang; Xu, Riley; Xu, Y.; Xue, T.; Yan, Y. L.; Yeh, Chih-Hsiang; Nan, Yi; Yu, C. X.; Yu, H. J.; Yue, Jianfeng; Zeng, Ming; Zeng, Zhi; Zhang, B. T.; Zhang, F. S.; Zhang, L.; Zhang, Z. H.; Zhao, K. K.; Zhao, M. G.; Zhou, Jifang; Zhou, Z. Y.; Zhu, J. J.

doi:10.1103/physrevlett.129.221301

Cited by 28 publications

(12 citation statements)

References 52 publications

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“…The scattering process between high velocity DM particles and the electrons in semiconductor detectors is rather complicated. With the development of computing techniques, novel DM-e scattering constraints will be derived from the CDEX experiment [19,72]. The cross sections given by Eq.…”

Section: T >Gev@mentioning

confidence: 99%

“…-The existence of dark matter (DM, denoted by χ) in the universe is supported by convincing cosmological evidence [1,2]. Direct detection (DD) experiments such as XENON [3], LUX [4], PandaX [5], DarkSide [6], CRESST [7], SuperCDMS [8], CoGeNT [9] and CDEX [10][11][12][13][14][15][16][17][18][19][20] are dedicated to probing DM-nucleus (χ-N) elastic scattering through spin-independent (SI) and spin-dependent interactions, yet no clear signals have been observed to date. DD experiments rapidly lose sensitivity toward the sub-GeV mass range, because light DM particles carry insufficient energy to generate nuclear recoil signals that exceed the threshold of the detector.…”

mentioning

confidence: 98%

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Constraints on sub-GeV dark matter boosted by cosmic rays from the CDEX-10 experiment at the China Jinping Underground Laboratory

Xu¹,

Yang²,

Yue³

et al. 2022

Phys. Rev. D

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We report new constraints on light dark matter (DM) boosted by blazars using the 205.4 kg day data from the CDEX-10 experiment located at the China Jinping Underground Laboratory. Two representative blazars, TXS 0506+56 and BL Lacertae are studied. The results derived from TXS 0506+56 exclude DM-nucleon elastic scattering cross sections from 4.6 × 10 −33 cm 2 to 1 × 10 −26 cm 2 for DM masses between 10 keV and 1 GeV, and the results derived from BL Lacertae exclude DMnucleon elastic scattering cross sections from 2.4 × 10 −34 cm 2 to 1 × 10 −26 cm 2 for the same range of DM masses. The constraints correspond to the best sensitivities among solid-state detector experiments in the sub-MeV mass range.

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Section: T >Gev@mentioning

confidence: 99%

mentioning

confidence: 98%

Constraints on sub-GeV dark matter boosted by cosmic rays from the CDEX-10 experiment at the China Jinping Underground Laboratory

Xu¹,

Yang²,

Yue³

et al. 2022

Phys. Rev. D

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“…Low-background experiments searching for rare processes using Ge detectors (e.g. double beta decay) have made significant contributions looking for new physics at low energy [1][2][3][4][5][6][7][8], especially following the development of p-type, point-contact detectors [9][10][11]. Models of the background contributions at energies below a few keV, however, have significant uncertainty.…”

Section: Introductionmentioning

confidence: 99%

Variable energy X-ray fluorescence source

et al. 2023

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We detail the design of a variable energy, x-ray fluorescence source using a low activity (1.8×106 dpm) 99Tc β source that irradiates thin foils. By rotating the source among foils of Ti, Zn, Nb, Ag, and Au, the device produces x rays between 4 and 70 keV at a rate near 1 Hz. When the source is placed in a storage position, the external radiation is non-detectable. The design of the shielding and rotation mechanism permits use in vacuum and at liquid nitrogen temperature. The design is intended for the study of the low energy response to radiation impinging upon Ge detector surfaces. The source will be useful for understanding the detector response in large-scale Ge arrays such as Majorana and LEGEND.

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“…The sub-GeV dark matter (DM) as an alternative candidate to the weakly interacting massive particles (WIMPs), has attracted increasing attention for its theoretical motivations and detection feasibility. The sub-GeV DM particles are expected to reveal itself via the weak DMelectron interaction in semiconductor targets (e.g., SENSEI [1], DAMIC [2], SuperCDMS [3], CDEX [4] and EDELWEISS [5]). In the theoretical front, since the introduction of the firstprinciples density functional theory (DFT) [6] method into the interpretation of DM signals in semiconductor detectors, similar investigations have been generalized to a wider range of target materials [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24], and have spurred further discussions on the methodology [25][26][27][28][29] and interpretations of the DM-electron interactions [30][31][32][33][34][35][36][37][38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

The linear response theory approach to the sub-GeV dark matter in the Sun

Liang,

Zhang

2023

J. Cosmol. Astropart. Phys.

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In recent years, the importance of the electronic in-medium effect in the sub-GeV dark matter (DM) direct detection has been recognized and a coherent formulation of the DM-electron scattering based on the linear response theory has been well established in the literature. In this paper, we apply the formulation to the scattering between DM particles and solar medium, and it is found that the dynamic structure factor inherently incorporate the particle-particle scattering and in-medium effect. Using this tool and taking a benchmark model as an example, we demonstrate how the in-medium effect affects the scattering of DM particles in the Sun, in both the heavy and the light mediator limit. Formulae derived in this work lay the foundation for accurately calculating the spectra of solar-accelerated DM particles, which is of particular importance for the detection of DM particles via plasmon in semiconductor targets.

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Constraints on Sub-GeV Dark Matter–Electron Scattering from the CDEX-10 Experiment

Cited by 28 publications

References 52 publications

Constraints on sub-GeV dark matter boosted by cosmic rays from the CDEX-10 experiment at the China Jinping Underground Laboratory

Constraints on sub-GeV dark matter boosted by cosmic rays from the CDEX-10 experiment at the China Jinping Underground Laboratory

Variable energy X-ray fluorescence source

The linear response theory approach to the sub-GeV dark matter in the Sun

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