Top associated Higgs boson production channel $ \rm \mathbf{ttH\rightarrow 2\ell + 1 \tau_{had}}$ at $\mathbf{\sqrt{s}= 13}$ TeV with the ATLAS experiment

The production of the Higgs boson in association with the top quarks allows a direct measurement of the Yukawa coupling as a key parameter of the Standard Model. A search for such process in multilepton final states mainly targeting the decays $\rm H \to WW^*$, $\tau\tau$, and $ZZ^*$ is performed using 13.2 $\rm \mathrm{fb}^{-1}$ of data recorded by the ATLAS detector in 2015 and 2016 at a center of mass energy $\sqrt{s} = 13$~TeV. An overview of the final state with two same-charge light leptons ($\rm e$ or $\rm \mu$) and one hadronically-decaying $\rm \tau$ is described in more detail. The best-fit value of the ratio of observed and Standard Model cross sections for the combined multilepton final states is 2.5$\pm$0.7(stat)$^{+1.1}_{-0.9}$(syst), which is consistent with the Standard Model expectation.