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

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She Z., Jia L. P., Yue Q., Ma H., Kang K. J., Li Y. J., ...More

PHYSICAL REVIEW LETTERS, vol.124, no.11, 2020 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 124 Issue: 11
  • Publication Date: 2020
  • Doi Number: 10.1103/physrevlett.124.111301
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Compendex, EMBASE, INSPEC, MEDLINE, zbMATH, DIALNET
  • Dokuz Eylül University Affiliated: No


We report constraints on the dark photon effective kinetic mixing parameter (kappa) 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 kappa 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 my from 0.1 to 4.0 keV/c(2) are set from 449.6 kg-day data, with a minimum of kappa = 1.3 x 10(-15) at my = 200 eV/c(2).