  We assume that the mass of the heavy standard particles ($Z,W,t,...$) arises
from a special coupling with dark matter and that this implies a corresponding
peculiar connection of these particles to the dark sector. We give examples of
possible tests of this assumption in $e^+e^-\to Z+X,~ W^+W^-+X, ~t\bar t+X$ and
we mention other possible studies.
