Zusammenfassung
The current status of electroweak precision observables in the Minimal
Supersymmetric Standard Model (MSSM) is reviewed. We focus in particular on the
$W$ boson mass, M_W, the effective leptonic weak mixing angle, sin^2 theta_eff,
the anomalous magnetic moment of the muon, (g-2)_\mu, and the lightest CP-even
MSSM Higgs boson mass, m_h. We summarize the current experimental situation and
the status of the theoretical evaluations. An estimate of the current
theoretical uncertainties from unknown higher-order corrections and from the
experimental errors of the input parameters is given. We discuss future
prospects for both the experimental accuracies and the precision of the
theoretical predictions. Confronting the precision data with the theory
predictions within the unconstrained MSSM and within specific SUSY-breaking
scenarios, we analyse how well the data are described by the theory. The mSUGRA
scenario with cosmological constraints yields a very good fit to the data,
showing a clear preference for a relatively light mass scale of the SUSY
particles. The constraints on the parameter space from the precision data is
discussed, and it is shown that the prospective accuracy at the next generation
of colliders will enhance the sensitivity of the precision tests very
significantly.
Nutzer