Search for $t\bar{t}H$, $H\rightarrow b\bar{b}$ production in ATLAS

The search of the production of the Higgs boson associated with a pair of top quarks in the ATLAS experiment is presented. It focuses on Higgs is decaying to $b\bar{b}$ and events containing one or two leptons (electrons or muons). It used 20.3 fb$^{-1}$ of $pp$ collision data at $\sqrt{s} = 8$~TeV collected with the the ATLAS detector at the LHC in 2012. No significant excess of events is found and the 95\% CL observed (expected) limit is 4.1 $\times$ SM (2.6 $\times$ SM) with a best fit $\mu$ of 1.7 $\pm$ 1.4.