Left-right models with light neutrino mass prediction and dominant neutrinoless double beta decay rate

TL;DR

This paper proposes a left-right symmetric model with high-scale parity that predicts light neutrino masses via inverse seesaw and dominant neutrinoless double beta decay through $W^-_L- W^-_R$ mediation, compatible with neutrino data.

Contribution

It introduces a class of high-scale parity left-right models with inverse seesaw for neutrino masses and dominant double beta decay predictions, resolving previous contradictions.

Findings

Neutrinoless double beta decay is dominated by $W^-_L- W^-_R$ mediation.

Model distinguishes between quark-lepton symmetric and asymmetric Dirac neutrino masses.

Predictions are consistent with neutrino oscillation data.

Abstract

In TeV scale left-right symmetric models, new dominant predictions to neutrinoless double beta decay and light neutrino masses are in mutual contradiction because of large contribution to the latter through popular seesaw mechanisms. We show that in a class of left-right models with high-scale parity restoration, these results coexist without any contravention with neutrino oscillation data and the relevant formula for light neutrino masses is obtained via gauged inverse seesaw mechanism. The most dominant contribution to the double beta decay is shown to be via $W^-_L- W^-_R$ mediation involving both light and heavy neutrino exchanges, and the model predictions are found to discriminate whether the Dirac neutrino mass is of quark-lepton symmetric origin or without it. We also discuss associated lepton flavor violating decays.