Search for non-resonant Higgs boson pair production in final states with leptons, taus, and photons in pp collisions at √s = 13 TeV with the ATLAS detector

A search is presented for non-resonant Higgs boson pair production, targeting the bbZZ, 4V (V = W or Z), VV tau tau, 4 tau, gamma gamma VV and gamma gamma tau tau decay channels. Events are categorised based on the multiplicity of light charged leptons (e