Final state QCD corrections to off-shell single top production in hadron collsions

In this paper, I study final state QCD radiative corrections to off-shell single top production via decaying W at hadron collider energies. The tree level Breit-Wigner distribution of the produced top invariant mass is distorted by final state QCD radiation, while the peak position remains unchanged. The exact one loop QCD calculation and the narrow width approximation agree in predicting the cross section, the hadronic transverse energy distribution and the bottom-lepton invariant mass distribution.