Full one-loop corrections to neutralino pair production in e+e- annihilation

We present the full one-loop radiative corrections to pair production of neutralinos in e+e- collisions within the Minimal Supersymmetric Standard Model. Particular attention is paid to the definition of weak and QED corrections. The non-universal QED corrections are extracted by subtracting the initial state radiation. We give numerical results for two different SUSY scenarios for e+e- -> neu_1 neu_2 and e+e- -> neu_2 neu_2. The weak and QED corrections are up to several percent or even higher and need to be taken into account at future linear collider experiments.Comment: Problem with Mathematica fonts in the figures fixe

Production of Stop, Sbottom, and Stau at LEP2

We present a comprehensive study of pair production and decay of stops, sbottoms, and staus in $e^+ e^-$ annihilation at LEP2. We give numerical predictions within the Minimal Supersymmetric Standard Model for cross sections and decay rates, and discuss the important signatures. In the case of stau production we also study the polarization of the tau in the decays stau_1 -> tau + neutralino_{1,2}.Comment: 15 pages, LateX, 13 figures appended as uuencoded PS-file. LateX file and figures are also available via anonymous ftp at ftp://info.oeaw.ac.at/pub/hephy-pub/64

Scalar Top Quark Production at μ+μ−\mu^+ \mu^- Colliders

We discuss the production of stops at a $\mu^+ \mu^-$ collider. We present numerical predictions for the cross sections within the Minimal Supersymmetric Standard Model. In particular we consider stop production near $\sqrt{s} = m_{H^0}$ and $\sqrt{s} = m_{A^0}$.Comment: 6 pages LaTeX including 5 figures. Talk presented by W. Porod at the "Workshop on Physics at the First Muon Collider and the Front End of a Muon Collider", November 6 - 9, 1997, FNAL, Batavia, Illinois, US

Phenomenology of stops, sbottoms, tau-sneutrinos, and staus at an e+e- Linear Collider

We discuss production and decays of stops, sbottoms, tau-sneutrinos, and staus in e+e- annihilation in the energy range \sqrt{s} = 0.5-1 TeV. We present numerical predictions within the Minimal Supersymmetric Standard Model for cross sections and decay rates, including one-loop radiative corrections as well as initial state radiation. We also study the importance of beam polarization for the determination of the underlying SUSY parameters. Moreover, we make a comparison of the potential to study squarks and sleptons of the 3rd generation between Tevatron, LHC, and Linear Collider.Comment: Version to be published in EPJdirec