Singularities in the Energy Distribution of a Single Lepton in the Search for Dark Matter Particles at the International Linear Collider/Compact Linear Collider: Source for Measuring Their Masses

The measuring of model-independent singularities in the energy distribution of a single lepton in the cascade process e(+)e(-) -> D+D- -> DDW+W- -> DD(q (q) over bar)mu v will allow one to reliably determine the mass of a candidate for dark matter D and its charged partners D-+/- in future experiments at the International Linear Collider/Compact Linear Collider (ILC/CLIC).