The production and decay of supersymmetric particles is presented. The
dependence of the hadro-production cross section for weakly and strongly
interacting yields an improvement of derived mass bounds or the measurement of
the masses, respectively, of neutralinos/charginos and stops at the Tevatron
and at the LHC. Moreover, the NLO corrections increase the predicted
neutralino/chargino cross section by +20% to +40%, nearly independent of the
mass of the particles. The consistent treatment as well as the phenomenological
implications of scalar top mixing are presented. The correction to the stop
production cross sections, depending on the fraction of incoming quarks and
gluons, varies between -10% to +40% for an increasing fraction of incoming
gluons. The dependence of this cross section on all parameters, except for the
masses of the produced particles, is negligible.Comment: 86 pages, LaTeX, 69 figures included; Ph.D. Thesis postscript file
also available from http://www.desy.de/~pleh
