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 $T_d\ll T_{F,{\tilde{\chi }}_1^0}\sim \mu /25$, 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.

10 pages, 2 figures. Final version PLB

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Cited by in corpus (4)

• The Dawn of FIMP Dark Matter: A Review of Models and Constraints
• When Freeze-out Precedes Freeze-in: Sub-TeV Fermion Triplet Dark Matter with Radiative Neutrino Mass
• Revisiting (s)neutrino dark matter in natural SUSY
• Collider fingerprints of freeze-in dark matter produced during the fast expansion phase of Universe