Scalar mass bounds in two supersymmetric extended electroweak gauge models

In two recently proposed supersymmetric extended electroweak gauge models, the reduced Higgs sector at the 100 GeV energy scale consists of only two doublets, but they have quartic scalar couplings different from those of the minimal supersymmetric standard model. In the SU(2)*SU(2)*U(1) model, there is an absolute upper bound of about 145 GeV on the mass of the lightest neutral scalar boson. In the SU(3)*U(1) model, there is only a parameter-dependent upper bound which formally goes to infinity in a particular limit.