Understanding dark matter, how it was produced in the early universe,
what its nature is and where it is located in the cosmos is one of the
fundamental physics problems of our century.
The large community working on dark matter is active and diversified,
and includes particle physics theorists and astrophysicists with a wide range of interests, as well as particle physics experimentalists focusing on collider, fixed-target, beam-dump, direct and indirect dark matter detection experiments, as well as dedicated axion/ALP experiments.
A broad and common approach to dark matter research is necessary
given the nature of the challenge.
The iDMEu expression of interest, which collects about 250 signatories to date,
aims at creating a permanent and common platform to exploit synergies and complementarities in dark matter searches across different communities.
We will discuss the origin of this initiative and its possible evolution in the future.