Characterisation of dark matter in direct detection experiments: Singlino versus Higgsino

We show how the material used in direct detection experiments of Dark Matter (DM), presence a signal it, can afford one with possibility extracting nature underlying candidate. do so for case $U(1)'$ Supersymmetric Standard Model (USSM) E$_6$ origin, by exploiting benchmark points over its parameter space that yield either Singlino- or Higgsino-like neutralino as DM candidate, latter being defined up-to-date constraints, from low to high energy and collider non-collider experiments. However, our method is general, we also introduce model-independent description analysis, purpose aiding similar studies other Beyond (BSM) scenarios. This has been made possible adapting rather simple $\chi^2$ analysis normally extraction procedure applied Xenon, Germanium Silicon detectors, those showing maximal complementary sensitivity gauge- Higgs-portal induced interactions their nuclei.