Studies of SUSY processes at ILC

The masses of charginos and neutralinos are important parameters in supersymmetry which can be measured at ILC with high precision. The SUSY point at which the chargino and neutralino decay by emission of on-shell W and Z bosons is studied and the corresponding mass measurement uncertainty is estimated. The second analysis presented is motivated by recent measurements of the neutralino relic density suggest a small mass splitting between the neutralino and the next to lightest SUSY particle (NLSP) assuming that neutralino accounts for the measured dark matter content of the universe. The ILC has a potential to cover a large fraction of the parameter space motivated by this SUSY scenario. The challenge is due to very low energy of jets, below 20-30 GeV, which pushes the jet clustering and tagging algorithms to their limits. Both analyses were performed within the SiD detector concept framework.