Neutrino masses in the $SU(4{)}_L\otimes U(1{)}_X$ electroweak extension of the standard model

Abstract

We study the neutrino mass generation in the $SU(4{)}_L\otimes U(1{)}_X$ electroweak extension of the standard model by considering non-renormalizable dimension five effective operators. It is shown that there exist two topologies for the realizations of such an operator at the tree-level and for one of the three-family models is explore the neutrino phenomenology after extending its particle content with an $SU(4{)}_L$ fermion singlet and a scalar decuplet. Constraints in the available parameters space of the model are partially discussed.

Comments: 14 pages, 2 figures, Accepted to IJMPA