Spontaneous breaking of the lepton number and invisible majoron in a 3-3-1 model

Abstract

In this work we implement the spontaneous breaking of the lepton number in the version II of the 3-3-1 models and study their phenomenological consequences. The main result of this work is that our majoron is invisible even though it belongs to a triplet representation by the 3-3-1 symmetry.

Comments: discussion on \rho parameter added, refs. added, to appear in EPJC