Measurement of the Higgs boson properties in the diphoton final state with the ATLAS detector

Properties of the Higgs boson are measured in the two-photon final state using 36.1 fb${-1}$ of proton-proton collision data recorded at $\sqrt{s}$ = 13TeV by the ATLAS experiment at the Large Hadron Collider. Cross-section measurements for the production of a Higgs boson through the main production processes are reported. Furthermore, the production of the Higgs boson decaying to two isolated photons in a fiducial region closely matching the experimental selection of the photons is measured. Finally the measurement of the mass of the Higgs boson in the $H \rightarrow \gamma\gamma$ decay channel and its combination with the $H \rightarrow ZZ^{\ast} \rightarrow 4l$ decay channel is reported.