Search for the Standard Model Higgs boson in the HWW decay mode with 4.7 fb-1 of ATLAS data at sqrt(s) = 7 TeV

A Higgs boson search in the $H o WW^{(ast)}$ decay mode has been performed using 4.7 fb$^{-1}$ of proton-proton collisions at a centre-of-mass energy of 7 TeV collected in 2011 with the ATLAS detector~cite{atlas}. The search in the final state with two leptons and two neutrinos covers a broad mass range from 110 to 600 GeV. In addition, the high mass region from 300 to 600 GeV is explored by the semi-leptonic final state with a lepton, neutrino and two or more jets. Upper limits are derived on the cross section of a Standard Model Higgs boson.