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Updated: Aug 16, 2025

Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
New Constraints on Extended Higgs Sectors from the Trilinear Higgs Coupling
Henning Bahl1, Johannes Braathen2, Georg Weiglein2,3
1University of Chicago, Department of Physics, 5720 South Ellis Avenue, Chicago, Illinois 60637, USA.
Abstract:
The trilinear Higgs coupling λ_{hhh} is crucial for determining the structure of the Higgs potential and for probing possible effects of physics beyond the standard model. Focusing on the two-Higgs-doublet model as a concrete example, we identify parameter regions in which λ_{hhh} is significantly enhanced with respect to the standard model. Taking into account all relevant corrections up to the two-loop level, we show that already current experimental bounds on λ_{hhh} rule out significant parts of the parameter space that would otherwise be unconstrained. We illustrate the interpretation of the results on λ_{hhh} for a benchmark scenario. Similar results are expected for wide classes of models with extended Higgs sectors.
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