The Soft-Virtual Higgs Cross-section at N3LO and the Convergence of the   Threshold Expansion
  We discuss the validity of the soft-virtual approximation and the threshold expansion for the Higgs boson production cross-section at hadron colliders in perturbative QCD up to next-to- next-to-next-to-leading order (N3LO). 
Franz Herzog, Bernhard Mistlberger
hep-ph