The ATLAS experiment is installed at the Large Hadron Collider (LHC) at CERN near Geneva, Switzerland. Two data taking periods have already taking place:
a) Run 1 (2011–2012), at 7 and 8 TeV in the center of mass (c.o.m). In this Run ATLAS and CMS discovered a standard model-like Higgs boson at 125 GeV (H), mainly through its bosonic decay modes.
b) Run 2 (2015–2018), at an energy of 13 TeV in the c.o.m, with greater integrated luminosity which allowed the observation of the main fermionic interactions of the Higgs boson (H → tt, H → bb, ttH production).