Search for the associated production of a Higgs boson and a top quark pair at the LHC

One of the important tests of the SM is the measurement
of the top quark Yukawa coupling, directly measured via the
associated production process pp→tt ̄ H. The fourfold increase of the
tt ̄ H cross section from √s=8 to 13 TeV and the high statistics of top
quark sample collected by the LHC experiments allow to increase the
sensitivity of the search of this process. Both ATLAS and CMS have
performed searches of tt ̄ H targeting the most relevant Higgs decays
modes in final states with multi leptons, high b-jet multiplicity or
containing two photons at √s=13 TeV. In this talk, the latest results on
the search for the tt ̄ H process with the ATLAS experiment will be
discussed, together with a comparison to the CMS performance and
an outlook of these measurements with higher statistics.