Search for the SM and MSSM Higgs boson in the ttH, H-->bb channel

A detailes study of the associated Standard Model Higgs boson production ttH with H-->bb is presented for the SM and MSSM scenarios. For the Higgs boson masses from 80 to 120 GeV and an integrated luminosity of 3 10^4 pb^-1 a clear evidence for an excess of events with four b-tagged jets over the background from W+jets and tt production should be observable. However, a clean reconstruc tion of the H-->bb mass peak will be difficult because of the combinatorial bgd from the signal itself. This problem can be to large extent overcome if both top-quark decays are reconstructed in addition to the reconstruction of the H-->bb mass peak. In the MSSM scenario, the low tanb region (up to tanb ~ 6) for an integrated luminosity of 3 10^4 pb^-1 and most of the (mA, tanb) parame ter space for an integrated luminosity of 10^5 pb^-1 would be accesible with this channel. Excellent b-tagging capability and good efficiency for jet recons truction are however necessary to explore this channel to its full potential.