Constraints on composite Dirac neutrinos from observations of galaxy clusters

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.

17 pages, 2 figures, minor modifications, a reference is added, this manuscript is published in Physics Letters B

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• 7 keV Sterile neutrino dark matter in $U(1{)}_R-$ lepton number model
• KeV Warm Dark Matter and Composite Neutrinos
• Neutrino Masses from Low Scale Partial Compositeness
• Neutrino Mass and $\mu \to e+\gamma$ from a Mini-Seesaw
• Emergent neutrinos from heavy messengers
• Composite Dark Matter and Neutrino Masses from a Light Hidden Sector