Search for Higgs boson pair production in the HH->bbyy final state with the full Run 2 + partial Run 3 pp collision data collected by the ATLAS Experiment

A search for non-resonant Higgs boson pair production in the $b\bar{b}\gamma\gamma$ final state is performed using the full Run 2 and partial Run 3 proton-proton collision data collected by the ATLAS experiment at the Large Hadron Collider at CERN. The data amounts to an integrated luminosity of 140 /fb at a center of mass energy of 13 TeV, plus 59 /fb at a center of mass energy of 13.6 TeV. The analysis is optimized to probe deviations from the Standard Model of both the Higgs-boson trilinear self-coupling modifier $\kappa_\lambda$ as well as the quartic HHVV (where V = W, Z) coupling modifier $\kappa_{2V}$.