Searches for a dark matter force mediator

Description
 heavy photon portal to Dark Matter is under investigation in accelerator-based experiments.  These heavy photons are a natural component of Dark Matter and allow us to explain a number of recent intriguing observations in astrophysics.
An overview of existing data and ongoing/proposed experiments at electron beam facilities will be presented.  I will also outline a newly developed proposal to search for a heavy photon using a positron beam and a hydrogen target.
That experiment will search for a bump in the mass range of
7-15 MeV in the missing mass spectrum of the electron-positron annihilation into one photon plus missing particle.
A possible e+e- beams collider for a low cm mass range using a sliding beam scheme will be discussed.
Organised by Cettina Sutera