Radiative neutrino mass generation and dark energy

TL;DR

This paper explores models where neutrino masses are generated radiatively at two loops, linking the resulting pseudo-Nambu-Goldstone bosons to dark energy and explaining the universe's accelerated expansion.

Contribution

It demonstrates that the potential energy of pNGBs from radiative neutrino mass models can account for dark energy with an equation of state close to -1.

Findings

pNGB potential can serve as dark energy

The model reproduces the observed EoS parameter w ≈ -1

Neutrino masses are connected to dark energy dynamics

Abstract

We study the models with radiative neutrino mass generation and explore the relation between the neutrino masses and dark energy. In these models, the pseudo-Nambu-Goldston bosons (pNGBs) arise at two-loop level via the Majorana neutrino masses. In particular, we demonstrate that the potential energy of the pNGB can be the dark energy potential and the observed value of the equation of state (EoS) parameter of the universe, $i.e.$, $w\simeq -1$, can be realized.