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arXiv · 1603.05668

The minimal linear sigma model for the Goldstone Higgs

Ferruccio Feruglio·Belen Gavela·Kirill Kanshin·Pedro Accioly Nogueira Machado·Stefano Rigolin·Sara Saa
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Abstract

In the context of the minimal SO(5) linear σ-model, a complete renormalizable Lagrangian -including gauge bosons and fermions- is considered, with the symmetry softly broken to SO(4). The scalar sector describes both the electroweak Higgs doublet and the singlet σ. Varying the σ mass would allow to sweep from the regime of perturbative ultraviolet completion to the non-linear one assumed in models in which the Higgs particle is a low-energy remnant of some strong dynamics. We analyze the phenomenological implications and constraints from precision observables and LHC data. Furthermore, we derive the d <= 6 effective Lagrangian in the limit of heavy exotic fermions.

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Ferruccio Feruglio, Belen Gavela, Kirill Kanshin, Pedro Accioly Nogueira Machado, Stefano Rigolin, Sara Saa. 2016-03-17. The minimal linear sigma model for the Goldstone Higgs. https://doi.org/10.1007/jhep06(2016)038

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