Neutral SU(2) gauge extension of the standard model and a vector-boson dark-matter candidate

If the standard model of particle interactions is extended to include a neutral SU(2)N gauge factor, with SU(3)C×SU(2)L×U(1)Y×SU(2)N embedded in E6 or [SU(3)]3, a conserved generalized R parity may appear. As a result, apart from the recent postulate of a separate non-Abelian gauge factor in the hidden sector, we have the first example of a possible dark-matter candidate X1 which is a non-Abelian vector boson coming from a known unified model. Using current data, its mass is predicted to be less than about 1 TeV. The associated Z′ of this model, as well as some signatures of the Higgs sector, should then be observable at the LHC (Large Hadron Collider).