Dark Sector Searches at Jefferson Laboratory

The Jefferson Laboratory community recently joined the dark sector search program with different, complementary efforts: APEX, HPS, DarkLight, and BDX. These fixed-target, electron-beam experiments are designed to search for Dark Matter in the mass range 10 MeV/c² - 1 GeV/c², the so-called "light Dark Matter" region. Each experiment is optimized to look for a specific light Dark Matter signal signature. In this paper, after a brief introduction to the light Dark Matter hypothesis, I present the four experiments, describing their scientific goal, the measurement setup, and the obtained or expected results. (paper)