Measurements of Higgs boson properties in the diphoton decay channel at $\sqrt{s}$ = 13 TeV

Measurements of Higgs boson properties in events where the Higgs boson decays into a pair of photons are reported. Events with two photons are selected from a sample of proton-proton collisions at $\sqrt{s}$ = 13 TeV collected by the CMS detector at the LHC from 2016 to 2018, corresponding to an integrated luminosity of $137\,\text{fb}^{-1}$. Analysis categories enriched in events produced via gluon fusion, vector boson fusion, vector boson associated production, and production associated with top quarks are constructed. The total Higgs boson signal strength, relative to the standard model prediction, is measured to be $1.03^{+0.11}_{-0.09}$. Other properties of the Higgs boson are measured, including standard model signal strength modifiers, production cross sections, and its couplings to other particles. All results are found to be in agreement with the standard model expectations.