Constraints on Energy Scales from Dark Matter Decay in a Gauged Model

Gambini G.; de Holanda P.C.; Carneiro S. · Brazilian Journal of Physics (2026) · DOI: 10.1007/s13538-025-01952-1

Resumen

Popular extensions of the standard model of particle physics feature new fields and symmetries which could, for example, dynamically generate neutrino masses from spontaneous symmetry breaking. If a new light scalar that decays into dark radiation appears in the spectrum of the theory, it could significantly modify the cosmological observables. In this case, cold dark matter could have a stable and a decaying component and limits on its decay rate can be used to put constraints on the new energy scales of a given model. We illustrate this idea using a gauged model where the dark radiation is in the form of light neutrinos. © The Author(s) under exclusive licence to Sociedade Brasileira de Física 2025.

Instituciones: Universidad Nacional de Ingeniería