Neutrinoless double beta decay in an $SU(3{)}_L\otimes U(1{)}_N$ model

Abstract

We consider a model for the electroweak interactions with $SU(3{)}_L\otimes U(1{)}_N$ gauge symmetry. We show that, it is the conservation of $F=L+B$ which forbids massive neutrinos and the neutrinoless double beta decay, $(\beta \beta {)}_{0\nu }$. Explicit and spontaneous breaking of $F$ imply that the neutrinos have an arbitrary mass and $(\beta \beta {)}_{0\nu }$ proceeds also with some contributions that do not depend explicitly on the neutrino mass.

Comments: Revtex, 15 pages and 6 figures (available from the authors)