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| CMS-PAS-HIG-24-012 | ||
| Search for nonresonant triple Higgs boson production in the six b-quark final state in proton-proton collisions at $ \sqrt{s} = $ 13 TeV | ||
| CMS Collaboration | ||
| 2025-10-07 | ||
| Abstract: A search for nonresonant triple Higgs boson production in the six b-quark final state is performed using data from proton-proton collisions at a center-of-mass energy of 13 TeV collected by the CMS experiment, and corresponding to an integrated luminosity of 138 fb$^{-1} $. The search targets final states in which the b quarks from the decays of the Higgs bosons are reconstructed in small-radius or large-radius jets, resulting in topologies that are fully boosted, partially boosted, partially resolved, or fully resolved. The analysis employs symmetry-preserving attention networks to categorize events in the respective topologies, and to classify signal and background events. The data are found to be compatible with the standard model predictions, and upper limits on the triple Higgs boson production cross section are set. The observed (expected) upper limit, at 95% confidence level, on the production rate times branching fraction, relative to the standard model prediction, is 588 (572), corresponding to an upper limit of 44 (43) fb on the cross section. The observed (expected) 95% confidence level intervals for the trilinear and quartic Higgs boson self-interaction coupling modifiers are $ [-7,12] ([-6,11]) $ for $ \kappa_{3} $, and $ [-190,190] ([-190,190]) $ for $ \kappa_{4} $. This result represents the best limit of triple Higgs boson production at the LHC and the most stringent constraint on the quartic coupling modifier $ \kappa_4 $ to date. | ||
| Links: CDS record (PDF) ; CADI line (restricted) ; | ||
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Compact Muon Solenoid LHC, CERN |
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