Neutrinoless double beta decay with and without Majoron-like boson emission in a 3-3-1 model - art. no. 096001

We consider the contributions to the neutrinoless double beta decays in a S U(3)(L)circle timesU(1)(N) electroweak model. We show that for a range of p arameters in the model there are diagrams involving vector-vector-scalar an d trilinear scalar couplings which can be potentially as contributing as th e light massive Majorana neutrino exchange one. We use these contributions to obtain constraints upon some mass scales of the model, such as the masse s of the new charged vector and scalar bosons. We also consider briefly the decay in which, in addition to the two electrons. a Majoron-like boson is emitted.