  We discuss two complementary strategies to search for light dark matter (LDM)
exploiting the positron beam possibly available in the future at Jefferson
Laboratory. LDM is a new compelling hypothesis that identifies dark matter with
new sub-GeV "hidden sector" states, neutral under standard model interactions
and interacting with our world through a new force. Accelerator-based searches
at the intensity frontier are uniquely suited to explore it. Thanks to the high
intensity and the high energy of the CEBAF (Continuous Electron Beam
Accelerator Facility) beam, and relying on a novel LDM production mechanism via
positron annihilation on target atomic electrons, the proposed strategies will
allow us to explore new regions in the LDM parameters space, thoroughly probing
the LDM hypothesis as well as more general hidden sector scenarios.
