Evidence for the associated production of the Higgs boson and a top quark pair with the ATLAS detector

Understand

A search for the associated production of the Higgs boson with a top quark pair ($t\bar t H$) is reported.

• The search is performed in multilepton final states using a dataset corresponding to an integrated luminosity of 36.1 fb$^{-1}$ of proton--proton collision data recorded by the ATLAS experiment at a center-of-mass energy $\sqrt{s} = 13$ TeV at the Large Hadron Collider.
• Higgs boson decays to $WW^*$, $\tau\tau$, and $ZZ^*$ are targeted.
• Seven final states, categorized by the number and flavor of charged-lepton candidates, are examined for the presence of the Standard Model Higgs boson with a mass of 125 GeV and a pair of top quarks.