Search for WH -> WWW -> l nu lnu jet jet using like-sign leptons

The search of the Higgs boson in the intermediate mass range wasinvestigated in the physics TDR looking at the decay channel H->WW followed by leptonic W decays. To assess the discoveryone can exploit production processes where the Higgsboson is produced inassociation with a W boson, so that the final state signature is3 W's.In this work, we examine the case with two W's decaying intocharged lepton neutrino pairs and one into hadronic jets. To achieve astrong rejection against the main backgrounds we require the two chargedleptons to be like-sign.We study the signal as well as the backgrounds using the ATLFASTsimulation and assuming both a low luminosity scenario (30 fb^-1) anda high luminosity one (100 fb^-1), proving that this channel canprovide a good evidence for Higgs boson in this mass range.