Z2-singlino dark matter in a portal-like extension of the minimal supersymmetric standardmodel

Abstract

We propose a Z2-stabilized singlino () as a dark matter candidate in extended andR-parity violating versions of the supersymmetric standard model. interacts with visible matter via a heavy messenger fieldS, which results in a supersymmetric version of the Higgs portal interaction. The relicabundance of can account for cold dark matter if the messenger mass satisfies GeV. Our model can be implemented in many realistic supersymmetric models such as thenext-to-minimal supersymmetric (SUSY) standard model and nearly minimal SUSYstandard model.