Studies on chargino production and decay at a photon collider

A Monte-Carlo analysis on production and decay of supersymmetric charginos at a future photon-collider is presented. A photon collider offers the possibility of a direct branching-ratio measurement. In this study, the process γγ→ χ+1 χ-1 → W+W- χ01 χ01 → q anti qq anti qχ01 χ01 has been considered for a specific mSUGRA scenario. Various backgrounds and a parameterised detector simulation have been included. Depending on the centre-of-mass energy, a statistical error for the directly measurable branching ratio BR(χ1± → χ10 W±) of up to 3.5% can be reached. (orig.)