Abstract
We discuss the vacuum structure of a version of the Georgi-Machecek model with an exact ℤ2 symmetry acting on the triplet fields. Besides the usual custodial-symmetric model, with ρ = 1 at tree-level, a model with a dark matter candidate is also viable. The other phases of the model lead to electric charge breaking, a wrong pattern of electroweak symmetry breaking or to ρ ≠ 1 at tree-level. We derive conditions to have an absolute minimum in each of the two viable phases, the custodial and the dark matter phases.
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Azevedo, D., Ferreira, P., Logan, H.E. et al. Vacuum structure of the ℤ2 symmetric Georgi-Machacek model. J. High Energ. Phys. 2021, 221 (2021). https://doi.org/10.1007/JHEP03(2021)221
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DOI: https://doi.org/10.1007/JHEP03(2021)221