Abstract
Alongwith \(SU(2)\times U(1)\) group of Standard Model an extra U(1) gauge group has been considered in a model in which dark matter field could be present. In such models there is also extra U(1) gauge boson apart from neutral Z boson which is present in Standard Model. PLANCK collaboration has obtained experimental bound on dark matter relic density. On the other hand, LHC has obtained constraint on such extra gauge boson mass and its gauge coupling. Based on these constraints we have discussed the allowed region of masses of extra gauge boson and the dark matter which is the lightest one among other right-handed Majorana fermions present in the model. From other experiments we have discussed in brief the possibility of further constraining such parameter space.
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