  Dark matter is the name assigned to one of the most important contemporary
challenges that fundamental physics research is facing. In recent years, the
hypothesis that dark matter might be "light" is gaining interest. Following
this idea, dark matter particles belong to a new, unexplored dark sector, that
is communicating with the Standard Model through one (or more) dark mediator
particles. The mass scale of such dark sector particles, i.e. the mediators and
the stable dark matter particles, could be comparable to the proton mass or
below. Light dark matter would be very difficult to detect with high-energy
colliders or with direct detection experiments, so that accelerator-based dark
matter searches with smaller, but dedicated experiments are important. The
capabilities of high-intensity cw electron and proton beams enable unique
opportunities for probing the dark sector. These experimental approaches are
complementary to searches for dark matter at the high-energy frontier with the
LHC at CERN. The aim of the workshop was to discuss light dark matter searches
with national and international experts from experiments as well as from
theory.
