Abstract
We introduce a new class of Composite Higgs models in which electroweak symmetry is broken by a seesaw-like mechanism. If a global symmetry is broken sequentially at different scales, two sets of pseudo-Goldstone bosons will arise, one set being typically heavier than the other. If two Composite Higgs doublets mix, then the mass-squared of the lighter state can be driven negative, and induce EWSB. We illustrate with the example SO(6) → SO(5) → SO(4), and derive an estimate of the light Higgs potential. We find that the introduction of an extra scale can ease many of the tensions present in conventional Composite Higgs models, especially those related to fine-tuning. In particular we find that we can significantly raise the upper bound on the mass of the elusive top partners.
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Sanz, V., Setford, J. Composite Higgses with seesaw EWSB. J. High Energ. Phys. 2015, 1–19 (2015). https://doi.org/10.1007/JHEP12(2015)154
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DOI: https://doi.org/10.1007/JHEP12(2015)154