Search of Stop, Sbottom, -Sneutrino, and Stau at an e+e- linear collider with √s = 0.5 – 2 TeV

We discuss pair production and decays of stops, sbottoms, τ -sneutrinos, and staus in e + e − . annihilation in the energy range √s = 500 GeV to 2 TeV. Numerical predictions within the Minimal Supersymmetric Standard Model (MSSM) for cross sections and decay rates are presented. We study the stop discovery potential for √s = 500 GeV and 10 fb .1 integrated luminosity for polarized e − . beams. Moreover, we give an estimate of the error of the soft. breaking stop and sbottom parameters that can be obtained by cross section measurements with polarized e − . beams.