TeV scale Left Right Symmetry with spontaneous D-parity breaking

TL;DR

This paper investigates the conditions under which left-right symmetric models with spontaneous D-parity breaking can have a TeV scale $SU(2)_R$ symmetry breaking, analyzing both non-supersymmetric and supersymmetric scenarios and their implications for neutrino masses.

Contribution

It provides a detailed analysis of the viability of TeV scale $SU(2)_R$ breaking in left-right models, highlighting the role of supersymmetry and scalar potential minimization.

Findings

TeV scale $M_R$ is possible with scalar potential minimization.

Gauge coupling unification favors TeV scale $M_R$ only in SUSYLR models.

Neutrino masses can be tiny in these models.

Abstract

The different scenarios of spontaneous breaking of D-parity have been studied in both non-supersymmetric and supersymmetric version of the left-right symmetric models(LRSM). We explore the possibility of a TeV scale $SU(2)_R$ breaking scale $M_R$ and hence TeV scale right handed neutrinos from both minimization of the scalar potential as well as the coupling constant unification point of view. We show that although minimization of the scalar potential allows the possibility of a TeV scale $M_R$ and tiny neutrino masses in LRSM with spontaneous D-parity breaking, the gauge coupling unification at a high scale $\sim 10^{16}$ GeV does not favour a TeV scale symmetry breaking except in the supersymmetric left-right (SUSYLR) model with Higgs doublet and bidoublet. The phenomenology of neutrino mass is also discussed.