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arXiv · 2012.11567

Neutrino parameters in the Planck-scale lepton number breaking scenario with extended scalar sectors

Cesar Bonilla·Johannes Herms·Alejandro Ibarra·Patrick Strobl
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Abstract

Two-loop effects on the right-handed neutrino masses can have an impact on the low-energy phenomenology, especially when the right-handed neutrino mass spectrum is very hierarchical at the cut-off scale. In this case, the physical masses of the lighter right-handed neutrinos can be dominated by quantum effects induced by the heavier ones. Further, if the heaviest right-handed neutrino mass is at around the Planck scale, two-loop effects on the right-handed neutrino masses generate, through the seesaw mechanism, an active neutrino mass which is in the ballpark of the experimental values. In this paper we investigate extensions of the Planck-scale lepton number breaking scenario by additional Higgs doublets (inert or not). We find that under reasonable assumptions these models lead simultaneously to an overall neutrino mass scale and to a neutrino mass hierarchy in qualitative agreement with observations.

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Cesar Bonilla, Johannes Herms, Alejandro Ibarra, Patrick Strobl. 2020-12-21. Neutrino parameters in the Planck-scale lepton number breaking scenario with extended scalar sectors. https://doi.org/10.1103/physrevd.103.035010

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