New dark matter candidate in the B-L symmetric SSM.

The B-L symmetric SUSY model (B-LSSM) introduces a new Z ′ gauge boson and two singlet scalars, which indicates there are more neutralinos in the B-LSSM comparing with the minimal SUSY extension of standard model (MSSM). These new neutralinos provide more dark matter (DM) candidates in the B-LSSM, we find that the super partner of the new scalar singlet can serve as the lightest supersymmetric particle (LSP) and be considered as a DM candidate. The properties of this new DM candidate are analyzed in this work. Taking into account the experimental constraints on Higgs boson mass, B meson rare decays and muon anomalous magnetic dipole moment, the numerical results are obtained and presented. The properties of new DM candidate in the B-LSSM satisfy the observed relic density Ω h 2 and comply with the latest upper bounds on σ SI χ 1 0 - n , and its mass is expected to greater than 80 GeV approximately. [ABSTRACT FROM AUTHOR]