Higgsino-like Dark Matter From Sneutrino Late Decays

Abstract : We consider Higgsino-like dark matter (DM) in the Minimal Supersymmetric Standard Model (MSSM) with additional right-handed neutrino chiral superfields, and propose a new non-thermal way of generating the right amount of relic DM via sneutrino late decays. Due to the large DM annihilation cross-section, decays must occur at lower temperatures than the freeze-out temperature Td≪TF,χ˜10∼μ/25 , implying a mostly right-handed lightest sneutrino with very small Yukawa interactions. In that context, the right amount of Higgsino-like DM relic density can be accounted for if sneutrinos are produced via thermal freeze-in in the early Universe.
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https://hal.archives-ouvertes.fr/hal-01555051
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Submitted on : Monday, July 3, 2017 - 6:33:46 PM
Last modification on : Wednesday, April 17, 2019 - 10:02:20 AM

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Anibal D. Medina. Higgsino-like Dark Matter From Sneutrino Late Decays. Phys.Lett.B, 2017, 770, pp.161-165. ⟨10.1016/j.physletb.2017.04.054⟩. ⟨hal-01555051⟩

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