Search for Higgs boson pair production in the bbWW decay channel with two leptons in the final state using proton-proton collision data at √ s = 13.6TeV

A search for Higgs boson pair production is presented, targeting final states where one Higgs boson decays to a bottom quark-antiquark pair and the other Higgs boson decays to two W bosons, both of which decay leptonically, to an electron or a muon, and a neutrino. For the first time, the search is conducted with proton-proton collision data from the LHC at $\sqrt{s}=13.6$ TeV, recorded with the CMS detector in 2022 and 2023 and corresponding to an integrated luminosity of 62 fb − 1 . The results are consistent with the standard model predictions. An upper limit of 12 . 0 times the standard model prediction at 95% confidence level is set on the Higgs boson pair production cross section, with an expected limit of 18 . 5. The results are also used to constrain the strength of the trilinear self-coupling of the Higgs boson, as well as of the quartic coupling between two Higgs bosons and two vector bosons.