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arXiv · 2212.11007

Holographic Composite Higgs Model Building: Soft Breaking, Maximal Symmetry, and the Higgs Mass

Simone Blasi·Julian Bollig·Florian Goertz
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Abstract

We study the emergence and phenomenological consequences of recently proposed new structures, namely soft breaking of the Higgs shift symmetry and `maximal symmetry' of the composite sector, in holographic realizations of composite Higgs models. For the former, we show that soft breaking can also successfully be implemented in a full 5D warped model, where symmetry-restoring universal boundary conditions for the fermion fields allow to break the problematic connection between a realistically light Higgs and anomalously light top partners. For the latter, we demonstrate that the minimal incarnation of maximal symmetry in the holographic dual leads to a sharp prediction of $m_h\approx 197$ GeV for $f=800$ GeV. We find that a viable implementation is possible with sizable negative gauge brane kinetic terms, allowing for $m_h=125$ GeV. Overall, both approaches offer promising directions to improve the naturalness also of holographic realizations of composite Higgs models.

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Simone Blasi, Julian Bollig, Florian Goertz. 2022-12-21. Holographic Composite Higgs Model Building: Soft Breaking, Maximal Symmetry, and the Higgs Mass. https://doi.org/10.1007/jhep07(2023)048

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