Study of the Higgs boson properties and search for high-mass scalar resonances in the $H \rightarrow ZZ^* \rightarrow 4\ell$ decay channel at $\sqrt{s}$ = 13 TeV with the ATLAS detector

The properties of the Higgs boson decaying to four leptons are studied using 14.8 fb$^{−1}$ of integrated luminosity collected in $pp$ collisions by the ATLAS detector at the LHC at a centre-of-mass energy of 13 TeV. The results include measurements of the fiducial cross sections, the different production mode cross sections and a test of beyond the Standard Model interactions using an effective Lagrangian approach. In addition, a search for scalar resonances decaying into the four-lepton final state is performed by exploring the mass range 200-1000 GeV. In all measurements no significant deviation from SM predictions are observed.