Speaker
Alexandra Sidley
Description
Since its discovery in 2012, measurements of the properties and couplings of the Higgs boson have been at the forefront of LHC physics. The trilinear self-coupling of the Higgs boson $\lambda$ determines the shape of the Higgs potential, and deviations of its value from the Standard Model prediction may point to new physics. $\lambda$ can be probed experimentally via diHiggs (HH) production. This talk presents a search for HH production with b-quark and photon pairs in the final state using the full Run 2 and partial Run 3 ATLAS datasets. The analysis strategy, key improvements from the Run 2 analysis and the published Run 2 results for the HH production cross-section and $\kappa_{\lambda}$ limits will be shown.
