We study the possibility of dark matter in the form of heavy neutrinos from a fourth lepton family with helicity suppressed couplings such that dark matter is produced thermally via annihilations in the early Universe. We present all possible constraints for this scenario coming from LHC and collider physics, underground direct detectors, neutrino telescopes, and indirect astrophysical searches. Although we embed the WIMP candidate within a model of composite dynamics, the majority of our results are model independent and applicable to all models where heavy neutrinos with suppressed couplings account for the dark matter abundance.
Journal of Cosmology and Astroparticle Physics, 2014, Vol 2014, Issue 2
dark matter theory dark matter detectors STERILE NEUTRINOS GAUGE-INVARIANCE STABLE PARTICLES ANNIHILATIONS ABUNDANCES COSMOLOGY CANDIDATE SEARCHES FERMI