Tumasyan, A.Adam, W.Andrejkovic, J.W.Bergauer, T.Chatterjee, S.Damanakis, K.Dragicevic, M.Gürpınar Güler, EmineGüler, Yalçın2023-11-112023-11-1120230031-90071079-7114https://doi.org/10.1103/PhysRevLett.131.041803https://hdl.handle.net/20.500.13091/4779A search for nonresonant Higgs boson ( H ) pair production via gluon and vector boson ( V ) fusion is performed in the four-bottom-quark final state, using proton-proton collision data at 13 TeV corresponding to 138 fb - 1 collected by the CMS experiment at the LHC. The analysis targets Lorentz-boosted H pairs identified using a graph neural network. It constrains the strengths relative to the standard model of the H self-coupling and the quartic V V H H couplings, κ 2 V , excluding κ 2 V = 0 for the first time, with a significance of 6.3 standard deviations when other H couplings are fixed to their standard model values. © 2023 CERN, for the CMS Collaboration.eninfo:eu-repo/semantics/openAccessBosonsGraph neural networksPhotonsTellurium compoundsBottom quarksFinal stateGraph neural networksHiggs bosonLorentzNonresonantPair productionProton proton collisionsThe standard modelVector bosonCouplingsarticlebosongluonquarkArticle10.1103/PhysRevLett.131.0418032-s2.0-85167760550