Description
We consider a Dark Matter scenario in a singlet extension model of the Minimal Supersymmetric Standard Model, which is known as nMSSM. We find that with high-scale supersymmetry breaking, the singlino can obtain a sizable radiative correction to the mass. This opens a Dark Matter scenario with resonant annihilation via the exchange of the Higgs boson. We show that the current Dark Matter abundance and the Higgs boson mass can be explained simultaneously. This scenario can be probed by XENON1T. We also mention the possibility of Electroweak Baryogenesis at high temperature in this model. If there exist vector like matters coupled to the singlet multiplet, the thermal effects deform the Higgs potential at high temperature which derives a first order phase transition. We show that a strong first order phase transition can occur when the temperature is around the supersymmetry breaking scale, which can be TeV scale.