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arXiv · 2005.13552

Electroweak baryogenesis and gravitational waves in a composite Higgs model with high dimensional fermion representations

Ke-Pan Xie·Ligong Bian·Yongcheng Wu
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Abstract

We study electroweak baryogenesis in the $SO(6)/SO(5)$ composite Higgs model with the third generation quarks being embedded in the $\textbf{20}'$ representation of $SO(6)$. The scalar sector contains one Higgs doublet and one real singlet, and their potential is given by the Coleman-Weinberg potential evaluated from the form factors of the lightest vector and fermion resonances. We show that the resonance masses at $\mathcal{O}(1\sim 10{\rm ~TeV})$ can generate a potential that triggers the strong first-order electroweak phase transition (SFOEWPT). The $CP$ violating phase arising from the dimension-6 operator in the top sector is sufficient to yield the observed baryon asymmetry of the universe. The SFOEWPT parameter space is detectable at the future space-based detectors.

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Ke-Pan Xie, Ligong Bian, Yongcheng Wu. 2020-05-27. Electroweak baryogenesis and gravitational waves in a composite Higgs model with high dimensional fermion representations. https://doi.org/10.1007/jhep12(2020)047

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