  A global analysis of the Standard Model Effective Field Theory (SMEFT) with
SFitter is performed using measurements of single top quark production and top
quark decay processes from ATLAS and CMS at center-of-mass energies of 7, 8 and
13 TeV. NLO QCD corrections are included in the theoretical predictions of all
involved processes. Correlations among theoretical and experimental
uncertainties are accounted for using DataPrep, which has been developed by the
author. Using the dataset prepared by this software, constraints for the
relevant degrees of freedom are derived. Almost all constraints are more than
three times more stringent than the values of the literature. This thesis sets
the technical and conceptual framework for a global fit of the entire top quark
and Higgs boson sectors, which the author is involved in. The project marks an
important milestone towards a truly global analysis constraining physics beyond
the Standard Model in a model-independent way.
