Constraints on the Blazar-Boosted Dark Matter from the CDEX-10 Experiment

We report new constraints on light dark matter (DM) boosted by blazars using the 205.4 kg day data from the CDEX-10 experiment located at the China Jinping Underground Laboratory. Two representative blazars, TXS 0506+56 and BL Lacertae are studied. The results derived from TXS 0506+56 exclude DM-nucleon elastic scattering cross sections from $4.6\times {10}^{-33}\mathrm{c}{\mathrm{m}}^2$ to $1\times {10}^{-26}\mathrm{c}{\mathrm{m}}^2$ for DM masses between 10 keV and 1 GeV, and the results derived from BL Lacertae exclude DM-nucleon elastic scattering cross sections from $2.4\times {10}^{-34}\mathrm{c}{\mathrm{m}}^2$ to $1\times {10}^{-26}\mathrm{c}{\mathrm{m}}^2$ for the same range of DM masses. The constraints correspond to the best sensitivities among solid-state detector experiments in the sub-MeV mass range.