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

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.

21 pages, 6 figures, 2 tables. Includes updated discussion on Goldstone boson related physics, Matches the published version

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Cited by in corpus (8)

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• Scotoseesaw model implied by dark right-handed neutrinos
• Dirac Scoto Inverse-Seesaw from $A_4$ Flavor Symmetry
• A common framework for fermion mass hierarchy, leptogenesis and dark matter
• Scotoseesaw mechanism from a $Z_3$ symmetry of matter
• Dark symmetry implication for right-handed neutrinos
• Leptogenesis and neutrino mass with one right-handed neutrino and Higgs inflaton