Light Dark Matter eXperiment (co-spokesperson)

LDMX aims to decisively test a variety of dark matter scenarios (including thermal origin scenarios) in the sub-GeV mass range, and to provide strong sensitivity to any other dark sector physics that couples to electrons below the GeV-scale. One area of concentration is on light hidden sector (or "dark sector") dark matter in the mass range of 0.5 MeV to 0.5 GeV, roughly in the mass range of familiar matter such as electrons and protons. In this mass range, dark matter can be a thermal relic provided it interacts with the Standard Model through GeV-scale vector or scalar mediated forces.