Electron-target experiment constraints on light dark matter produced in primordial black hole evaporation
Tong Li, Jiajun Liao
Abstract
Light sub-GeV dark matter (DM) particles in the Milky Way or macroscopic objects such as primordial black holes (PBHs) become attractive DM candidates due to null results of the weakly interacting massive particle from direct detection experiments. We explore the possibility in which the present PBHs play as a novel source to produce light boosted DM and confine light PBHs with current and future terrestrial facilities. We study the electron elastic scattering data and obtain the current constraints from Super-Kamiokande and XENON1T on the boosted DM from PBH evaporation. The prospective bounds on the sub-GeV DM-electron scattering cross section and the fraction of DM composed of PBHs ${f}_{\mathrm{PBH}}$ are also imposed for future Xenon experiments.