Non-thermal right-handed sneutrino dark matter and the Omega_DM/Omega_b problem

Abstract

We argue that the superpartner of the Dirac right-handed neutrino is a prime candidate for dark matter created from a 'mattergenesis' mechanism. We show that due to the smallness of the Yukawa couplings, a right-handed sneutrino density created in the early Universe would not be erased by annihilations, which remain out of thermal equilibrium. It would also not be drowned by a later, additional production of right-handed sneutrinos, as the relic density of the non-thermal right-handed sneutrinos is found to be generally negligible compared to the observed dark matter density. Mild constraints on sneutrino masses and trilinear SUSY-breaking couplings are obtained. Possible mattergenesis scenarios are also mentioned

11 pages, 2 figures, 2 typos added, 1 reference added, minor corrections in section 3

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• Right-handed sneutrino dark matter in the NMSSM
• Freeze-Twin Dark Matter
• The cosmology of sub-MeV dark matter freeze-in
• Neutrino-Flavoured Sneutrino Dark Matter
• Very light right-handed sneutrino dark matter in the NMSSM
• A Unified Theory of Matter Genesis: Asymmetric Freeze-In
• Common Origin of Dirac Neutrino Mass and Freeze-in Massive Particle Dark Matter
• Collider, direct and indirect detection of supersymmetric dark matter
• Revisiting the Fermionic Dark Matter Absorption on Electron Target
• The Secret Higgstory of the Highest Temperature during Reheating
• Right sneutrinos and the signals of a stable stop at the Large Hadron Collider
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• Higgs bosons near 125 GeV in the NMSSM with constraints at the GUT scale
• Revisiting (s)neutrino dark matter in natural SUSY
• Natural SUSY at LHC with Right-Sneutrino LSP
• Dark matter candidates in the NMSSM with RH neutrino superfields
• Mass-varying Dark Matter from a Phase Transition
• Short review about the MSSM with three right-handed neutrinos (MSSM3RHN)
• Right-handed sneutrinos as asymmetric DM and neutrino masses from neutrinophilic Higgs bosons
• The Hierarchy Problem: From the Fundamentals to the Frontiers
• Multi-Component Dark Matter from Minimal Flavor Violation
• Right-handed sneutrino and gravitino multicomponent dark matter in light of neutrino detectors
• Resolving a challenging supersymmetric low-scale seesaw scenario at the ILC