Abstract
We study constraints on Composite Higgs models with fermion partial compositeness from electroweak precision measurements, including the 2022 W-boson mass result from the CDF collaboration. We focus on models where the Composite Higgs sector arises from underlying four-dimensional strongly interacting gauge theories with fermions, and where the SM fermions obtain their mass via linear mixing terms between the fermions and the composite sector — the so-called fermion partial compositeness scenario. In general, the Composite Higgs sector leads to a small and positive S parameter, and a negative T parameter, but the fermion partial compositeness sector results in an overall positive T parameter in a large part of parameter space. We, therefore, find good agreement between the full composite models and the current electroweak precision measurement bounds on S and T from LEP and CDF, including the offset and correlation of S, T with respect to the SM predictions.
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Frandsen, M.T., Rosenlyst, M. Electroweak precision tests of composite Higgs models. J. High Energ. Phys. 2023, 222 (2023). https://doi.org/10.1007/JHEP03(2023)222
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DOI: https://doi.org/10.1007/JHEP03(2023)222