Search for Higgs with H to WW* in the leptonic decay mode with the ATLAS detector at LHC

Abstract : Using about 1 fb-1 of ATLAS data at 7 TeV proton-proton centre-of-mass energy taken in 2011, Higgs boson searches in the Higgs decay mode H → WW (∗) → lνlν (l = e, μ) have been performed with sensitivity exceeding anything currently available. Important sensitivity to Higgs bosons masses between about 140 and 180GeV is available. The results are also interpreted in a model with a fourth sequential generation of fermions with heavy masses where enhanced production gives greater sensitivity.