Search for Nonresonant Pair Production of Highly Energetic Higgs Bosons Decaying to Bottom Quarks

Présentation

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 $V V H H$ 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.