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

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 $\mathit{\text{a}}\mathit{\text{la}}\mathit{\text{seesaw}}$, while the solar scale is $\mathit{\text{scotogenic}}$, 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.