  The continuously improving sensitivity of dark matter direct detection
experiments has limited the interaction between dark matter and nucleons being
increasingly feeble, while the dark matter relic density favors it to take part
in weak interactions. After taking into account the constraints from the Large
Hadron Collider (LHC) search for Higgs bosons and sparticles, it is becoming
difficult for the neutralino dark matter in the Minimal Supersymmetric Standard
Model and the Next-to-Minimal Supersymmetric Standard Model to possess these
two seemingly paradoxical features in their most natural parameter space for
electroweak symmetry breaking due to the limited theoretical structure. In
contrast, the seesaw extension of the Next-to-Minimal Supersymmetric Standard
Model, which was initially proposed to solve the neutrino mass problem, enables
the lightest sneutrino to act as a viable dark matter candidate, readily has
these features, and thus, it easily satisfies the constraints from dark matter
and LHC experiments. Compared with the Type-I seesaw extension, the dark matter
physics in the inverse seesaw extension is more flexible, allowing it to be
consistent with the experimental results in broader parameter space. We
conclude that weakly interacting massive particles (such as the sneutrino in
this study) work well in supersymmetric theories as dark matter candidates.
