New dark matter candidate in the $$B-L$$ symmetric SSM
Jin-Lei Yang (Department of Physics, Hebei University, Baoding, 071002, China, Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province, Baoding, 071002, China); Zhong-Jun Yang (Department of Physics, Chongqing Key Laboratory for Strongly Coupled Physics, Chongqing University, Chongqing, 401331, China); Xiu-Yi Yang (Department of Science, University of Science and Technology Liaoning, Anshan, 114051, China); Hai-Bin Zhang (Department of Physics, Hebei University, Baoding, 071002, China, Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province, Baoding, 071002, China); Tai-Fu Feng (Department of Physics, Hebei University, Baoding, 071002, China, Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province, Baoding, 071002, China)
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 $$\Omega h^2$$ and comply with the latest upper bounds on $$\sigma _\textrm{SI}^{\chi _1^0-n}$$ , and its mass is expected to greater than $$80\;\textrm{GeV}$$ approximately.
