Abstract

This talk gives an overview of the theory status of top quark physics at the LHC, explainig which quantities are known to what precision and critically examining theoretical uncertainites. Particular emphasis is given to non-factorizable corrections, i.e. corrections that link the production and decay stages of top quark processes, which are usually neglected. In many cases this approximation is justified, but when it comes to very precise determinations of the top quark mass, these corrections have to be carefully analysed.