Dortmund 2021 – scientific programme

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T: Fachverband Teilchenphysik

T 26: Higgs physics (theory)

T 26.10: Talk

Tuesday, March 16, 2021, 18:15–18:30, Ta

Theoretical constraints on multi-Higgs scalar potentials: the case of the 331 model — •Margherita Ghezzi — Institut für Theoretische Physik, Eberhard Karls Universität Tübingen, Tübingen, Deutschland

Extensions of the Standard Model presenting a multi-Higgs potential are subject to a set of theoretical constraints in order to be physically viable. This talk reviews these constraints for the case of a general extension of the Standard Model that encompasses a SU(3)_c × SU(3)_L × U(1)_X gauge symmetry. In this respect, the boundedness from below is analysed to identify the correct criteria for obtaining the physical minima of the Higgs parameter space. Furthermore, perturbativity and unitarity bounds are discussed in light of the exact diagonalisation of the scalar fields. Altogether, these constraints provide a restriction of the parameter space to be taken into account prior to any further experimental study.