Combined measurement of the total and differential cross sections in the $H \rightarrow \gamma \gamma$ and the $H \rightarrow ZZ^* \rightarrow 4\ell$ decay channels at $\sqrt{s} = 13$ TeV with the ATLAS detector

Combined measurements of the total and differential cross-sections of Higgs boson production are performed with proton-proton collisions recorded by the ATLAS detector at the Large Hadron Collider. The data correspond to an integrated luminosity of 139 $\textrm{fb}^{-1}$ produced at a center-of-mass energy of 13 TeV. The cross-sections are obtained from the measured $H \rightarrow ZZ^* \rightarrow 4\ell$ and $H \rightarrow \gamma \gamma$ event yields, which are combined accounting for luminosity, detector effects, acceptances, and branching fractions. The measured total Higgs boson production cross-section is 55.5$^{+4.0}_{-3.8}$ pb, which is in agreement with the Standard Model prediction of $55.6\pm 2.8$ pb. Differential cross-section measurements are also performed as a function of the Higgs boson transverse momentum, the Higgs boson rapidity, number of jets in the event, and the transverse momentum of the leading jet. The results from the two decay channels are found to be compatible with each other, and their combination agrees with the Standard Model predictions. A combined interpretation of the measured Higgs boson fiducial transverse momentum distribution is also performed to indirectly probe the Yukawa coupling of the Higgs boson to the bottom and charm quarks. The obtained limits are consistent with Standard Model expectations.