Extended GWS Model Using Left-Right Symmetry and Its Prediction on Neutrino Mass

TL;DR

This paper evaluates a left-right symmetric model's predictions for neutrino and charged lepton masses, highlighting the role of parity violation and a seesaw-like mechanism in generating small neutrino masses.

Contribution

It extends the GWS model by incorporating left-right symmetry and predicts neutrino masses using a seesaw-like mechanism with specific parameter values.

Findings

Neutrino masses are in the sub-eV range.

Parity violation is linked to a large $M_{W_{R}}$ mass.

The model's predictions depend on the parameter $ ho$.

Abstract

We evaluate the predictions of the left-right symmetry model based on $SU(2)\otimes U(1)$ gauge group with one bidoublet and one doublet Higgs fields on the parity violation, charged leptons and neutrinos masses. Parity violation in the weak interaction is due to the very large $M_{W_{R}}$ mass compare to the $M_{W_{L}}$ mass. The charged leptons acquire a Dirac mass via ordinary Higgs mechanism, meanwhile the neutrinos acquire a very small Dirac masses via seesaw-like mechanism with values $m_{1}=0.000043$ eV, $m_{2}=0.008888$ eV, $m_{3}=0.014948$ eV when $\rho=8.4\times 10^{-11}$, or m_{1}=0.000014$ eV, $m_{2}=0.003032$ eV, $m_{3}=0.050990$ eV when $\rho=2.9\times 10^{-11}$.