Chapter 2. Economical 3-3-1 Model

In Section 2.1. we recall the idea of constructing the two-Higgs triplet 3-3-1 model. In Section 2.2., masses of charged gauge bosons are given and an exact diagonalization of neutral ones and their mixings are presented. Because of the mixings, currents in this model have unusual features in the neutrino sectors which are presented in Section 2.3. In Section 2.4., constraints on the parameters of the model and some phenomena are sketched. We outline the main features in the last section—Section 2.5.