Measurements of Higgs boson production cross sections and couplings in the diphoton decay channel at $\sqrt{s} = $ 13 TeV

Measurements of Higgs boson production cross sections and couplings in events
where the Higgs boson decays into a pair of photons are reported. Events are selected
from a sample of proton-proton collisions at √
s = 13 TeV collected by the CMS detector
at the LHC from 2016 to 2018, corresponding to an integrated luminosity of 137 fb−1
.
Analysis categories enriched in Higgs boson 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 (SM)
prediction, is measured to be 1.12±0.09. Other properties of the Higgs boson are measured,
including SM signal strength modifiers, production cross sections, and its couplings to other
particles. These include the most precise measurements of gluon fusion and vector boson
fusion Higgs boson production in several different kinematic regions, the first measurement
of Higgs boson production in association with a top quark pair in five regions of the Higgs
boson transverse momentum, and an upper limit on the rate of Higgs boson production in
association with a single top quark. All results are found to be in agreement with the SM
expectations.