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| Main Author: | |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2407.13554 |
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Table of Contents:
- The Higgs boson (H) trilinear self-coupling, $λ_3$, 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 $κ_λ$, defined as the value of $λ_3$ normalized to its standard model prediction, while simultaneously constraining the Higgs boson couplings to fermions and vector bosons. Values of $κ_λ$ outside the interval $-$1.2 $\lt$ $κ_λ$ $\lt$ 7.5 are excluded at 2$σ$ confidence level, which is compatible with the expected range of $-$2.0 $\lt$ $κ_λ$ $\lt$ 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) $κ_λ$ interval is constrained to be within $-$1.4 $\lt$ $κ_λ$ $\lt$ 7.8 ($-$2.3 $\lt$ $κ_λ$ $\lt$ 7.8) at 2$σ$ confidence level.