Impact of inert higgsino dark matter

Abstract: We consider a recently proposed supersymmetric radiative seesaw model which is coupled with the minimal supergravity. The conventional R parity and invariance are imposed, which ensures the existence of a multi-component dark matter system. We assume that the pair of the lightest neutralino and the fermionic component of the inert Higgs supermultiplet is dark matter. If is lighter than , and the lightest neutral inert Higgs boson is kinematically forbidden to decay (third dark matter), the allowed region in the plane increases considerably, where and are the universal soft-supersymmetry-breaking scalar and gaugino mass, respectively, although the dominant component of the multi-component dark matter system is . There is a wide allowed region above the recent LHC limit. [Copyright &y& Elsevier]