2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/43547The properties of the light charged sleptons in $\ser\ser$, $\smur\smur$ and $\stau_1\stau_1$ production are studied within the mSUGRA scenario SPS 1a. Various method are presented to determine very precisely masses, angular distributions, spin and couplings as well as the $\stau_1$ polarisation and mixing parameter in the $\stau$ sector. The analysis is based on a complete simulation of signal and background reactions assuming experimental conditions of the TESLA $e^+e^-$ Linear Collider.13 pages, 10 figures. Contribution to the ECFA/DESY LC StudyHigh Energy Physics - Phenomenologytext