Single-top hadroproduction in association with a W boson
  We present the calculation of the Wt single-top production channel to next-to-leading order in QCD, interfaced with parton showers within the MC@NLO formalism. This channel provides a complementary way of investigating the properties of the Wtb vertex, with respect to the s- and t-channels. We pay special attention to the separation of this process from top quark pair production. 
S. Frixione, E. Laenen, P. Motylinski, B. Webber, C. D. White