Absorption of sub-MeV fermionic dark matter by electron targets

  title={Absorption of sub-MeV fermionic dark matter by electron targets},
  author={Jeff Asaf Dror and Gilly Elor and Robert McGehee and Tien-Tien Yu},
  journal={Physical Review D},
We study a new class of signals where fermionic dark matter is absorbed by bound electron targets. Fermionic absorption signals in direct detection and neutrino experiments are sensitive to dark matter with sub-MeV mass, probing a region of parameter space in which dark matter is otherwise challenging to detect. We calculate the rate and energy deposition spectrum in xenon-based detectors, making projections for current and future experiments. We present two possible models that display… 

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