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arXiv · 2508.10102

Extended Color Twin Higgs

Brian Batell·Thomas Cochran·Logan Page·Christopher B. Verhaaren
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Abstract

We describe a novel variation of the mirror Twin Higgs model in which the color gauge group in both sectors is extended to SU(4$)_c$ and spontaneously broken to SU(3$)_c$ exclusively in the visible sector. Through this process, the mirror $Z_2$ symmetry is spontaneously broken, allowing for a phenomenologically viable electroweak vacuum alignment. This structure produces interesting collider signatures, including heavy vectors and fermions with fractional electric charges. The twin sector, with unbroken SU(4$)_c$, produces interesting cosmological characteristics, such as the possibility to reduce $\Delta N_\text{eff}$ and stable spin-0 baryons. The enlarged top quark sector required by the extended color gauge symmetry preserves naturalness, with even less tuning than the original twin Higgs in many circumstances.

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Brian Batell, Thomas Cochran, Logan Page, Christopher B. Verhaaren. 2025-08-13. Extended Color Twin Higgs. https://arxiv.org/abs/2508.10102

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