I discuss single top quark production at the Tevatron and the LHC. The cross section, including soft-gluon threshold corrections through NNNLO, is presented for each partonic channel. The higher-order corrections provide significant contributions to the single top cross sections at both colliders.
Kidonakis, N. 2007. Higher-order threshold corrections in single top quark production. Proceedings of 15th International Workshop on Deep-Inelastic Scattering and Related Subjects, Munich, April 2007.