Gegenbauer’s Twin
(2022) Journal of High Energy Physics — Vol. 05, n° 5, p. 140 (2022)
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- Authors
Salvioni, Ennio 
- Abstract
- In Twin Higgs models the dominant source of fine-tuning is the cancellation of order v$^{2}$/f$^{2}$ required to obtain a Standard Model-like Higgs, where v and f are the electroweak and new physics scales, respectively. Recently proposed Gegenbauer Goldstone models naturally realise v$^{2}$/f$^{2}$ « 1 and hence remove this source of fine-tuning. By combining the two into ‘Gegenbauer’s Twin’, we obtain a symmetry-based model for Higgs-sector naturalness consistent with current collider measurements without fine-tuning of parameters. Single-Higgs coupling deviations of a few percent and trilinear self-coupling deviations of order one are irreducible in the natural parameter space. Thus, notably, the fingerprints of Gegenbauer’s Twin could emerge first through di-Higgs measurements at the High-Luminosity LHC.
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Citations
Durieux, G., McCullough, M., & Salvioni, E. (2022). Gegenbauer’s Twin. Journal of High Energy Physics, 05(5), 140. https://doi.org/10.1007/JHEP05(2022)140 (Original work published 2022)