Extended Higgs Sectors in Radiative Neutrino Models

Abstract

Testable Higgs partners may be sought within the extensions of the SM Higgs sector aimed at generating neutrino masses at the loop level. We study a viability of extended Higgs sectors for two selected models of radiative neutrino masses: a one-loop mass model, providing the Higgs partner within a real triplet scalar representation, and a three-loop mass model, providing it within its two-Higgs-doublet sector. The Higgs sector in the one-loop model may remain stable and perturbative up to the Planck scale, whereas the three-loop model calls for a UV completion around 106 GeV. Additional vector-like lepton and exotic scalar fields, which are required to close one- and three-loop neutrino-mass diagrams, play a decisive role for the testability of the respective models. We constrain the parameter space of these models using LHC bounds on diboson resonances.

arXiv commentaccepted for PLB, 17 pages, descendant of arXiv:1606.05163, code available at https://github.com/openhep/ackp16B

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• Charged scalars confronting neutrino mass and muon g-2 anomaly
• Loop induced type-II seesaw model and GeV dark matter with $U(1{)}_{B-L}$ gauge symmetry
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• A model with isospin doublet $U(1{)}_D$ gauge symmetry
• BSM Matter providing Neutrino Masses and Gauge Unification