  A compelling framework to explain dark matter and electroweak baryogenesis is
supersymmetry with light scalar top quarks (stops) and a small mass difference
between the stop and the lightest neutralino. In this work, the stop detection
capability at the ILC for small mass differences between the stop and the
neutralino is studied. The analysis is based on a fast and realistic detector
simulation. Significant sensitivity for mass differences down to 5 GeV is
obtained. It is discussed how the relevant parameters of the scalar tops can be
extracted and used to compute the dark matter density in the universe.
