125 GeV Higgs at the LHC: $t\bar{t}H$

The associated production of a Standard Model Higgs boson with a top quark pair is a key process to isolate in order to get direct access to top-Higgs Yukawa coupling $y_t$. Searches for this channel looking at events with the Higgs boson decaying into $b\bar{b}$ have been performed by ATLAS and CMS Collaborations and are here presented. In addition, a first result in the $H\rightarrow\gamma\gamma$ decay channel by the CMS Collaboration is also presented. No significant excess of events above the background expectation is observed in any of the analyses, and 95% confidence-level upper limits on the production cross section are derived for a Higgs boson with a mass between 110 and 150 Gev. For a Higgs boson with a mass of 125 Gev, the observed 95% confidence-level upper limit are 13.1, 5.8 and 5.1 times the Standard Model cross section for the three presented analyses respectively.