A bstract We perform a systematic study of the fermionic DM absorption interactions on electron target in context effective field theory. The is not just sensitive to sub-MeV with efficient energy release, but also gives unique signature clear peak recoil spectrum whose shape largely determined by atomic effects. Fitting Xenon1T and PandaX-II data prefers mass at m χ = 59 keV 105 keV, respectiv...
