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arXiv · 2307.04840

Dynamical scoto-seesaw mechanism with gauged $B-L$

Julio Leite·Soumya Sadhukhan·José W. F. Valle
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Abstract

We propose a dynamical scoto-seesaw mechanism using a gauged $B-L$ symmetry. Dark matter is reconciled with neutrino mass generation, in such a way that the atmospheric scale arises \textit{a la seesaw}, while the solar scale is \textit{scotogenic}, arising radiatively from the exchange of ``dark'' states. This way we ``explain'' the solar-to-atmospheric scale ratio. The TeV-scale seesaw mediator and the two dark fermions carry different $B-L$ charges. Dark matter stability follows from the residual matter parity that survives $B-L$ breaking. Besides having collider tests, the model implies sizeable charged lepton flavour violating (cLFV) phenomena, including Goldstone boson emission processes.

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Julio Leite, Soumya Sadhukhan, José W. F. Valle. 2023-07-10. Dynamical scoto-seesaw mechanism with gauged $B-L$. https://doi.org/10.1103/physrevd.109.035023

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