Speaker
G Carrillo Montoya
(Department of Physics-University of Wisconsin)
Description
The SM Higgs boson in the medium and high mass ranges has a large
branching ratio for decays to a pair of neutral weak bosons. Three
decay modes of the Z boson pair have been explored by ATLAS. One Z is typically produced on-shell, which can be tagged using leptonic decay products. The decay of the second Z(*) leads to three independent search channels: llqq, llvv and llll. Background compositions and topologies differ among these channels. The llqq search can use jet information to reduce top and Z+jets backgrounds; the llvv search requires a good understanding of missing transverse energy, while the 4 lepton ('golden') channel is almost background-free and, owing to its low production rate, needs excellent lepton efficiencies in order to be sensitive.
This talk summarizes results in all three H->ZZ channels using data
collected in 2011.
Author
G Carrillo Montoya
(Department of Physics-University of Wisconsin)
