  Comparisons of the coverage of current and proposed dark matter searches can
help us to understand the context in which a discovery of particle dark matter
would be made. In some scenarios, a discovery could be reinforced by
information from multiple, complementary types of experiments; in others, only
one experiment would see a signal, giving only a partial, more ambiguous
picture; in still others, no experiment would be sensitive and new approaches
would be needed. In this whitepaper, we present an update to a similar study
performed for the European Strategy Briefing Book performed within the dark
matter at the Energy Frontier (EF10) Snowmass Topical Group We take as a
starting point a set of projections for future collider facilities and a method
of graphical comparisons routinely performed for LHC DM searches using
simplified models recommended by the LHC Dark Matter Working Group and also
used for the BSM and dark matter chapters of the European Strategy Briefing
Book. These comparisons can also serve as launching point for cross-frontier
discussions about dark matter complementarity.
