Speaker
Description
We propose a supersymmetric extension of the minimal $U(1)_X$ model, along with a new $Z_2$-parity. One of the salient features of this model relates to how the $U(1)_X$ gauge symmetry is broken at the TeV scale. The running of the Majorana coupling of the $Z_2$-even right handed neutrino is shown to become large due to radiative corrections. As a result, this running causes the mass squared of the corresponding right handed sneutrino to negative values and is ultimately responsible for breaking the gauge symmetry. By assigning one right-handed neutrino $Z_2$-odd parity, it can remain a viable dark matter (DM) candidate, despite R-parity being broken. Furthermore, the DM relic abundance receives an enhanced annihilation cross section due to the $U(1)_X$ gauge boson ($Z'$) resonance and is in agreement with the current observations. We have found a complementarity that exists between the observed DM relic abundance and search results for the $Z^\prime$ boson resonance at the Large Hadron Collider that further constrains the parameter space of our $U(1)_X$ model.
