Inverse Seesaw, dark matter and the Hubble tension

@article{FernandezMartinez2021InverseSD,
  title={Inverse Seesaw, dark matter and the Hubble tension},
  author={Enrique Fernandez-Martinez and Mathias Pierre and Emanuelle Pinsard and Salvador Rosauro-Alcaraz},
  journal={The European Physical Journal C},
  year={2021}
}
We consider the inverse Seesaw scenario for neutrino masses with the approximate Lepton number symmetry broken dynamically by a scalar with Lepton number two. We show that the Majoron associated to the spontaneous symmetry breaking can alleviate the Hubble tension through its contribution to $$\Delta N_\text {eff}$$ Δ N eff and late decays to neutrinos. Among the additional fermionic states required for realizing the inverse Seesaw mechanism, sterile neutrinos at the keV-MeV scale… 

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