Testing a U(1) solution to the μ problem

We discuss the collider phenomenology of TeV Z' gauge bosons related to the absence of a bare mu-term in the superpotential. Decays of the type Z' -> Higgsinos can directly test whether a gauge symmetry is responsible for forbidding the Higgsino mass. Decays to multilepton final states may allow these signatures to be observed at the CERN Large Hadron Collider. We comment on whether it will be possible to state definitively that the mu-term is forbidden via a gauge symmetry.