"DarkLight: looking for dark matter at the JLab Free Electron Laser"

The Dark Forces explanation of dark matter predicts a low mass 
(0.01-10 GeV/c^2) scalar or vector boson that kinetically mixes with 
the photon.  DarkLight will look for evidence of the dark force by 
search for an electron positron resonance in ep->epee scattering. 
The experiment makes use of the 1MW free electron laser beam, a dense 
H2 target and a detector able to measure all three final state leptons 
and the recoiling proton, allowing full reconstruction of each event.

After briefly reviewing the theory, I will describe our experiment and 
several other experiments exploring other parts of the parameter 
space.