The discovery potential of a Heavy Higgs (MH > 800 GeV) using full GEANT simulation of ATLASr

Full GEANT simulation of the Heavy Higgs (m>800 GeV) production via WW fusion, as well as ttbar and W+jets backgrounds have been performed. The efficiencies for reconstructiong the W to jet-jet decay, for vetoing jets in the central region (rapidit , for vetoing jets in the central region (rapidity < 2) and for tagging jets in the forward regions (2.0 < |rapidity| < 4.$) have been evaluated, with particular attention given to high luminosity pile-up noise. The discovery potential for a heavy Higgs is then evaluated. We confirm previous particle level results which concluded that 3 years running at low luminosity would be sufficient to discover a heavy Higgs in the WW to ll nunu channel.