PHYSICAL REVIEW D, vol.59, no.1, 1999 (SCI-Expanded)
We investigate the reduction of a general TeV-scale supersymmetric extra U(1) model to a 2HDM below the TeV scale through tree level non-decoupling. Portions of the parameter space of the extra U(1) model appropriate for obtaining a 2HDM are identified. Various properties of the resulting 2HDM are connected to the parameter space of the underlying model. [S0556-2821(98)01623-3].