2012/05/02 by Stephen F. King, Alexander Merle · 1 citation
Physics and Astronomy · #Astrophysics #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Dark matter #Electron #Fermion #Hot dark matter #Inert #Lepton #Neutrino #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum mechanics #Warm dark matter #astro-ph.CO #hep-ph
paper · pdf · doi:10.1088/1475-7516/2012/08/016
32 pages, 9 figures, 2 tables
arxiv created 2012/05/02 · openalex publication_date 2012/08/16 · arxiv updated 2015/06/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We propose a simple model for Warm Dark Matter (WDM) in which two fermions are added to the Standard Model: (quasi-) stable ``keVins'' (keV inert fermions) which account for WDM and their unstable brothers, the ``GeVins'' (GeV inert fermions), both of which carry zero electric charge and zero lepton number, and are (approximately) ``inert'', in the sense that their only interactions are via suppressed couplings to the Z . We consider scenarios in which stable keVins are thermally produced and their abundance is subsequently diluted by entropy production from the decays of the heavier unstable GeVins. This mechanism could be implemented in a wide variety of models, including E 6 inspired supersymmetric models or models involving sterile neutrinos.