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arXiv · 2106.05298

Inverse Seesaw, dark matter and the Hubble tension

Enrique Fernandez-Martinez·Mathias Pierre·Emanuelle Pinsard·Salvador Rosauro-Alcaraz
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Abstract

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 $\Delta N_\text{eff}$ and late decays to neutrinos. Among the additional fermionic states required for realizing the inverse Seesaw mechanism, sterile neutrinos at the keV-MeV scale can account for all the dark matter component of the Universe if produced via freeze-in from the decays of heavier degrees of freedom.

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Enrique Fernandez-Martinez, Mathias Pierre, Emanuelle Pinsard, Salvador Rosauro-Alcaraz. 2021-06-09. Inverse Seesaw, dark matter and the Hubble tension. https://doi.org/10.1140/epjc%2Fs10052-021-09760-y

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