Constraints on composite Dirac neutrinos from observations of galaxy clusters

TL;DR

This paper investigates how observations of galaxy clusters constrain a model where sterile composite Dirac neutrinos, potentially warm dark matter candidates, arise from a confining hidden sector related to neutrino mass generation.

Contribution

The study provides new observational constraints on a composite Dirac neutrino model involving sterile neutrinos as warm dark matter from galaxy cluster data.

Findings

Constraints limit sterile neutrino properties based on galaxy cluster observations.

Sterile neutrinos remain viable dark matter candidates within certain parameter ranges.

Observational data narrows the allowed parameter space for the model.

Abstract

Recently, to explain the origin of neutrino masses a model based on confining some hidden fermionic bound states into right-handed chiral neutrinos has been proposed. One of the consequences of condensing the hidden sector fields in this model is the presence of sterile composite Dirac neutrinos of keV mass, which can form viable warm dark matter particles. We have analyzed constraints on this model from the observations of satellite based telescopes to detect the sterile neutrinos in clusters of galaxies.