Dark matter asymmetry in supersymmetric Dirac leptogenesis

Abstract

We discuss asymmetric or symmetric dark matter candidate in the supersymmetric Dirac leptogenesis scenario. By introducing a singlet superfield coupling to right-handed neutrinos, the overabundance problem of dark matter can be evaded and various possibilities for dark matter candidate arise. If the singlino is the lightest supersymmetric particle (LSP), it becomes naturally asymmetric dark matter. On the other hand, the right-handed sneutrino is a symmetric dark matter candidate whose relic density can be determined by the usual thermal freeze-out process. The conventional neutralino or gravitino LSP can be also a dark matter candidate as its non-thermal production from the right-handed sneutrino can be controlled appropriately. In our scenario, the late-decay of heavy supersymmetric particles mainly produce the right-handed sneutrino and neutrino which is harmless to the standard prediction of the big-bang nucleosynthesis.

6 pages, no fig

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• Low scale Dirac leptogenesis and dark matter with observable $\Delta N_{\mathrm{eff}}$
• Light Dirac right-handed sneutrino dark matter
• Leptogenesis with testable Dirac neutrino mass generation
• S.M.A.S.H.E.D.: Standard Model Axion Seesaw Higgs Inflation Extended for Dirac Neutrinos
• Double type-II Dirac seesaw accompanied by Dirac fermionic dark matter
• Phenomenology in supersymmetric neutrinophilic Higgs model with sneutrino dark matter
• Cogenesis of visible and dark matter in type-I Dirac seesaw
• Probing High Scale Dirac Leptogenesis via Gravitational Waves from Domain Walls