Constraints on the Higgs boson self-coupling from the combination of single and double Higgs boson production in proton-proton collisions at $\sqrt{s}$ = 13 TeV

Abstract

The Higgs boson (H) trilinear self-coupling, ${\lambda }_3$, is constrained via its measured properties and limits on the HH pair production using the proton-proton collision data collected by the CMS experiment at $\sqrt{s}$ = 13 TeV. The combination of event categories enriched in single-H and HH events is used to measure ${\kappa }_{\lambda }$, defined as the value of ${\lambda }_3$ normalized to its standard model prediction, while simultaneously constraining the Higgs boson couplings to fermions and vector bosons. Values of ${\kappa }_{\lambda }$ outside the interval $-$1.2 $<$ ${\kappa }_{\lambda }$ $<$ 7.5 are excluded at 2$\sigma$ confidence level, which is compatible with the expected range of $-$2.0 $<$ ${\kappa }_{\lambda }$ $<$ 7.7 under the assumption that all other Higgs boson couplings are equal to their standard model predicted values. Relaxing the assumption on the Higgs couplings to fermions and vector bosons the observed (expected) ${\kappa }_{\lambda }$ interval is constrained to be within $-$1.4 $<$ ${\kappa }_{\lambda }$ $<$ 7.8 ($-$2.3 $<$ ${\kappa }_{\lambda }$ $<$ 7.8) at 2$\sigma$ confidence level.

Replaced with the published version. Added the journal reference and the DOI. All the figures and tables, including an additional supplementary table, can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/HIG-23-006 (CMS Public Pages)

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Cited by in corpus (6)

• Extracting Higgs Self-Coupling Constraints through Triple Higgs Boson Production at Future Hadron Colliders
• Fate of the scalar quartic couplings in the inert models
• Transformers for Charged Particle Track Reconstruction in High Energy Physics
• Constraining the Higgs potential using multi-Higgs production
• Probing new physics in the Boosted $HH\to b\bar{b}\gamma \gamma$ channel at the LHC
• Tests of BSM Higgs interactions by the combination $({\kappa }_V^2-{\kappa }_{2V})$ in HHjj production at LHC