Prospects for measuring Higgs pair production in the channel $H(\rightarrow\gamma\gamma)H(\rightarrow b\overline{b}) $ using the ATLAS detector at the HL-LHC

Studies are presented on the prospects for the observation of Higgs pair production in the channel $H(\rightarrow\gamma\gamma)H(\rightarrow b\overline{b})$ using an upgraded ATLAS detector, assuming a dataset comprising 3000~fb$^{-1}$ of 14~TeV proton-proton collisions at the High-Luminosity LHC (HL-LHC). Generator-level Monte Carlo events are used to perform this study, with parameterised efficiencies and resolution applied to approximate the expected performance of the upgraded ATLAS detector under HL-LHC conditions. After event selection, a signal yield of around $8$ events is obtained for the Standard Model scenario, corresponding to a signal significance of 1.3 $\sigma$.