Bilepton contributions to the neutrinoless double beta decay in the economical 3-3-1 model

TL;DR

This paper investigates how bileptons in the economical 3-3-1 model contribute to neutrinoless double beta decay, highlighting the roles of Majorana and Dirac neutrino masses and deriving constraints on bilepton mass.

Contribution

It demonstrates that both Majorana and Dirac neutrino masses can simultaneously dominate neutrinoless double beta decay in this model, depending on the gauge boson mixing angle.

Findings

Both Majorana and Dirac neutrino masses contribute to decay.

Constraints on bilepton mass are derived.

Decay contributions depend on gauge boson mixing angle.

Abstract

Possible contributions of the bilepton to the neutrinoless double beta $(\beta\beta)_{0\nu}$ decay in the economical 3-3-1 model are discussed. We show that the $(\beta\beta)_{0\nu}$ decay in this model is due to both sources--Majorana $<M_{\nu}>_{L}$ and Dirac $<M_{\nu}>_{D}$ neutrino masses. If the mixing angle between charged gauge bosons, the standard model $W$ and bilepton $Y$, is in range of the ratio of neutrino masses $<M_{\nu}>_{L}/< M_{\nu}>_{D}$, both the Majorana and Dirac masses simultaneously give contributions dominant to the decay. As results, constraints on the bilepton mass are also given.