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Search for Cosmic-Ray Boosted Sub-GeV Dark Matter at the PandaX-II Experiment

  • (PandaX-II Collaboration)
  • Shanghai Jiao Tong University
  • Yalong River Hydropower Development Company, Ltd.
  • Sun Yat-Sen University
  • Shandong University
  • Nankai University
  • Fudan University
  • Peking University
  • Zhengzhou University
  • University of Shanghai for Science and Technology
  • University of Maryland, College Park
  • University of Science and Technology of China
  • Beihang University
  • CAS - Purple Mountain Observatory

科研成果: 期刊稿件文章同行评审

摘要

We report a novel search for the cosmic-ray boosted dark matter using the 100 tonne·day full dataset of the PandaX-II detector located at the China Jinping Underground Laboratory. With the extra energy gained from the cosmic rays, sub-GeV dark matter particles can produce visible recoil signals in the detector. The diurnal modulations in rate and energy spectrum are utilized to further enhance the signal sensitivity. Our result excludes the dark matter-nucleon elastic scattering cross section between 10-31 and 10-28 cm2 for dark matter masses from 0.1 MeV/c2 to 0.1 GeV/c2, with a large parameter space previously unexplored by experimental collaborations.

源语言英语
文章编号171801
期刊Physical Review Letters
128
17
DOI
出版状态已出版 - 29 4月 2022

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