Possible search for dark matter connected to massive standard particles in $e^{+}{e}^{-}$ collisions

We assume that the mass of the heavy standard particles ($Z,W,t,\mathrm{.}\mathrm{.}\mathrm{.}$) 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.