Research Papers in Physics and Astronomy


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PHYSICAL REVIEW LETTERS 131, 041803 (2023). DOI: 10.1103/PhysRevLett.131.041803


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A 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 VVHH couplings, κ2V, excluding κ2V = 0 for the first time, with a significance of 6.3 standard deviations when other H couplings are fixed to their standard model values.

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