Speaker
Description
Natural SUSY with light, nearly mass-degenerate Higgsinos is a theoretically well motivated scenario which would in general escape LHC searches. An
electron-positron collider would provide a clean environment where the Higgsinos would be either discovered or excluded. We present a detailed study of
precision measurements of Higgsinos at the proposed International Linear Collider with $\sqrt{s}$ = 500 GeV, using a Geant4-based simulation of the International
Large Detector concept. The scenarios considered have Higgsino mass differences of 10 - 20 GeV and a heavy scalar sector. The precision measurements can be used
to determine the parameters of NUHM2. Alternatively, weak scale gaugino masses can be extracted which allows for tests of gaugino mass unification.
