Direct Detection Constraints on Dark Photons with the CDEX-10 Experiment at the China Jinping Underground Laboratory

Z She; L P Jia; Q Yue; H Ma; K J Kang; Y J Li; M Agartioglu; H P An; J P Chang; J H Chen; Y H Chen; J P Cheng; W H Dai; Z Deng; X P Geng; H Gong; P Gu; Q J Guo; X Y Guo; L He; S M He; H T He; J W Hu; T C Huang; H X Huang; H B Li; H Li; J M Li; J Li; M X Li; X Li; X Q Li; Y L Li; B Liao; F K Lin; S T Lin; S K Liu; Y D Liu; Y Y Liu; Z Z Liu; Y C Mao; Q Y Nie; J H Ning; H Pan; N C Qi; C K Qiao; J Ren; X C Ruan; B Sevda; C S Shang; V Sharma; L Singh; M K Singh; T X Sun; C J Tang; W Y Tang; Y Tian; G F Wang; L Wang; Q Wang; Y Wang; Y X Wang; Z Wang; H T Wong; S Y Wu; H Y Xing; Y Xu; T Xue; Y L Yan; L T Yang; N Yi; C X Yu; H J Yu; J F Yue; M Zeng; Z Zeng; B T Zhang; L Zhang; F S Zhang; Z Y Zhang; M G Zhao; J F Zhou; Z Y Zhou; J J Zhu; CDEX Collaboration

doi:10.1103/PhysRevLett.124.111301

Direct Detection Constraints on Dark Photons with the CDEX-10 Experiment at the China Jinping Underground Laboratory

Phys Rev Lett. 2020 Mar 20;124(11):111301. doi: 10.1103/PhysRevLett.124.111301.

Authors

Z She¹, L P Jia¹, Q Yue¹, H Ma¹, K J Kang¹, Y J Li¹, M Agartioglu^{2

3}, H P An⁴, J P Chang⁵, J H Chen², Y H Chen⁶, J P Cheng^{1

7}, W H Dai¹, Z Deng¹, X P Geng¹, H Gong¹, P Gu⁸, Q J Guo⁹, X Y Guo⁶, L He⁵, S M He⁶, H T He⁸, J W Hu¹, T C Huang¹⁰, H X Huang¹¹, H B Li², H Li⁵, J M Li¹, J Li¹, M X Li⁸, X Li¹¹, X Q Li¹², Y L Li¹, B Liao⁷, F K Lin², S T Lin⁸, S K Liu⁸, Y D Liu⁷, Y Y Liu⁷, Z Z Liu¹, Y C Mao⁹, Q Y Nie¹, J H Ning⁶, H Pan⁵, N C Qi⁶, C K Qiao⁸, J Ren¹¹, X C Ruan¹¹, B Sevda^{2

3}, C S Shang⁶, V Sharma^{2

13}, L Singh^{2

13}, M K Singh^{2

13}, T X Sun⁷, C J Tang⁸, W Y Tang¹, Y Tian¹, G F Wang⁷, L Wang¹⁴, Q Wang^{1

4}, Y Wang^{1

4}, Y X Wang⁹, Z Wang⁸, H T Wong², S Y Wu⁶, H Y Xing⁸, Y Xu¹², T Xue¹, Y L Yan⁸, L T Yang¹, N Yi⁵, C X Yu¹², H J Yu⁵, J F Yue⁶, M Zeng¹, Z Zeng¹, B T Zhang¹, L Zhang⁸, F S Zhang⁷, Z Y Zhang¹, M G Zhao¹², J F Zhou⁶, Z Y Zhou¹¹, J J Zhu⁸; CDEX Collaboration

Affiliations

¹ Key Laboratory of Particle and Radiation Imaging (Ministry of Education) and Department of Engineering Physics, Tsinghua University, Beijing 100084.
² Institute of Physics, Academia Sinica, Taipei 11529.
³ Department of Physics, Dokuz Eylül University, İzmir 35160.
⁴ Department of Physics, Tsinghua University, Beijing 100084.
⁵ NUCTECH Company, Beijing 100084.
⁶ YaLong River Hydropower Development Company, Chengdu 610051.
⁷ College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875.
⁸ College of Physics, Sichuan University, Chengdu 610064.
⁹ School of Physics, Peking University, Beijing 100871.
¹⁰ Sino-French Institute of Nuclear and Technology, Sun Yat-sen University, Zhuhai, 519082.
¹¹ Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413.
¹² School of Physics, Nankai University, Tianjin 300071.
¹³ Department of Physics, Banaras Hindu University, Varanasi 221005.
¹⁴ Department of Physics, Beijing Normal University, Beijing 100875.

PMID: 32242731
DOI: 10.1103/PhysRevLett.124.111301

Abstract

We report constraints on the dark photon effective kinetic mixing parameter (κ) with data taken from two p-type point-contact germanium detectors of the CDEX-10 experiment at the China Jinping Underground Laboratory. The 90% confidence level upper limits on κ of solar dark photon from 205.4 kg-day exposure are derived, probing new parameter space with masses (m_{V}) from 10 to 300 eV/c^{2} in direct detection experiments. Considering dark photon as the cosmological dark matter, limits at 90% confidence level with m_{V} from 0.1 to 4.0 keV/c^{2} are set from 449.6 kg-day data, with a minimum of κ=1.3×10^{-15} at m_{V}=200 eV/c^{2}.