Search for Cosmic-Ray Boosted Sub-MeV Dark-Matter–Electron Scattering in PandaX-4T

Collaboration
Mar 13, 2024
6 pages
Published in:
  • Phys.Rev.Lett. 133 (2024) 10, 101805
  • Published: Sep 5, 2024
e-Print:

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Abstract: (APS)
We report the first search for the elastic scatterings between cosmic-ray boosted sub-MeV dark matter (DM) and electrons in the PandaX-4T liquid xenon experiment. Sub-MeV DM particles can be accelerated by scattering with electrons in the cosmic rays and produce detectable electron recoil signals in the detector. Using the commissioning data from PandaX-4T of 0.63tonne·year exposure, we set new constraints on DM-electron scattering cross sections for DM masses ranging from 10eV/c2 to 3keV/c2.
Note:
  • 6 pages, 3 figures
  • experimental results
  • dark matter: mass
  • xenon: liquid
  • electron: recoil
  • cosmic radiation
  • dark matter: elastic scattering