Higgs production cross-section in a Standard Model with four generations   at the LHC
  We present theoretical predictions for the Higgs boson production cross-section via gluon fusion at the LHC in a Standard Model with four generations. We include QCD corrections through NLO retaining the full dependence on the quark masses, and the NNLO corrections in the heavy quark effective theory approximation. We also include electroweak corrections through three loops. Electroweak and bottom-quark contributions are suppressed in comparison to the Standard Model with three generations. 
Charalampos Anastasiou, Stephan Buehler, Elisabetta Furlan, Franz   Herzog, Achilleas Lazopoulos
hep-ph hep-ex