Münster 2017 – wissenschaftliches Programm
T 32.6: Vortrag
Dienstag, 28. März 2017, 12:15–12:30, JUR 498
Constraints on Higgsino-like Neutralinos from Dark Matter Constraints in the Constrained Next-to-Minimal Supersymmetry Scenarios — •Conny Beskidt1, Wim de Boer1, Dmitri Kazakov1,2, and Stefan Wayand1 — 1Karlsruhe Institute of Technology (IEKP) — 2JINR, ITEP, Moscow, Russia
The lightest neutralino in supersymmetric models is a perfect dark matter (DM) candidate since it is neutral, weakly interacting and can provide the right amount on dark matter but the nature of the neutralino is still unknown. However, no DM particle has been found so far in deep underground laboratories, where the recoil of a nuclei from a collision with a DM particle is searched for, which is either proportional to the spin (spin dependent SD) or mass of the nucleus (spin independent SI) of the target material. The resulting limits on the scattering cross section from direct DM searches can be used to restrict the allowed parameter space of SUSY models. In the constrained minimal supersymmetric standard model (CMSSM) where the lightest neutralino is almost a pure bino, the parameter space excluded by the SD searches is already excluded by limits on the SI cross section. In contrast, within the NMSSM the SD searches yield additional constraints. We provide a scan over the NMSSM parameter space for different specific NMSSM scenarios to show the impact of the DM constraints. We show that the natural scenarios which predict a singlino-like lightest neutralino are in agreement with the current DM data while neutralinos with a significant amount of Higgsino admixture are under pressure and will be tested in future direct DM experiments.