Associated Standard Model Higgs boson search with ATLAS

The associated Standard Model Higgs boson production has the lowest cross-section among the four production processes at the LHC. Nevertheless, in the low Higgs boson mass range, the associated production of a Higgs boson with a tt-pair might contribute to the Higgs boson discovery. Furthermore, it can contribute valuable information in the measurement of Higgs boson properties, in particular on the ttH Yuakawa coupling. A Monte Carlo study of the channel ttH, H->bb in the semi-leptonic final state as well as the results of feasibility studies for the H ->WW final states of ttH and WH at the ATLAS experiment will be presented here.