TL;DR
This paper introduces a minimal composite twin Higgs model based on SO(6)/SO(5) symmetry, featuring a neutral top partner that cancels the Higgs potential contribution, achieving electroweak symmetry breaking with low fine-tuning.
Contribution
It presents a simplified twin Higgs framework with minimal symmetry and particle content, utilizing a neutral top partner within a composite Higgs model.
Findings
Achieves electroweak symmetry breaking with 5-10% fine-tuning.
Maintains compatibility with the observed Higgs mass.
Controls the Z2 breaking inherent in the model.
Abstract
We present a version of the twin Higgs mechanism with minimal symmetry structure and particle content. The model is built upon a composite Higgs theory with global symmetry breaking. The leading contribution to the Higgs potential, from the top sector, is solely cancelled via the introduction of a Standard Model neutral top partner. We show that the inherent breaking of this construction is under control and of the right size to achieve electroweak symmetry breaking, with a fine-tuning at the level of , and compatibly with the observed Higgs mass. We briefly discuss the particular phenomenological features of this scenario.
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