“School of Physics”

Back to Papers Home
Back to Papers of School of Physics

Paper   IPM / P / 16284
School of Physics
  Title:   Pico-charged particles explaining 511 keV line and XENON1T signal
1.  Y. Farzan
2.  M. Rajaee
  Status:   Published
  Journal: Phys. Rev. D
  No.:  10
  Vol.:  102
  Year:  2021
  Pages:   103532
  Supported by:  IPM
There is a robust signal for a 511 keV photon line from the galactic center which may originate from the annihilation of dark matter pair with mass of a few MeV to electron and positron. To avoid the bounds from delayed recombination and from the absence of the line from dwarf galaxies, we have proposed a model in 2017 in which dark matter first decay into a pair of intermediate pico-charged particles with a lifetime about 10000 the age of the universe. The galactic magnetic field accummulates the relativistic pico-charged particles that eventually annihilate, producing the electron positron pair that give rise to the 511 keV line. The relativistic pico-charged C particles can scatter on the electrons inside the direct dark matter search detectors imparting a recoil energy of Er about keV. We show that this model can account for the electron recoil excess recently reported by the XENON1T experiment.

Download TeX format
back to top
scroll left or right