Title: Cosmology and Signals of Strongly Interacting Dark Sectors

Abstract:

Standard Model particles
account for a small fraction of the matter content of the universe.
If the remaining dark matter (DM) was ever in thermal equilibrium
with itself or with the Standard Model (SM) sector, there must
exist interactions that allowed its number density to be depleted
to its present value.
An interesting possibility for achieving this arises in scenarios
where the DM is composed of “pions” of a QCD-like dark sector.
Consistency with observations of large and small scale structure in the universe requires a non-zero coupling
with SM states, suggesting a multitude of experimental probes.
I will review the cosmological production of
DM in these strongly interacting dark sectors and discuss the prospects for discovering them at fixed target experiments.