An Electroweak Model With Massive Neutrinos

TL;DR

This paper proposes an electroweak model incorporating massive neutrinos with an extended symmetry, predicting suppressed lepton flavor conversion and no neutrinoless double beta decay, with elusive right-handed neutrinos.

Contribution

It introduces a novel electroweak model with an additional $U(1)_M$ symmetry and massive neutrinos, maintaining lepton-number conservation and predicting small neutrino interactions.

Findings

Neutrino mixing allows lepton flavor change, but at very low probabilities.

Lepton-number conservation prohibits neutrinoless double beta decay.

Right-handed neutrinos have extremely weak couplings, making them hard to detect.

Abstract

In this paper, an electroweak model with massive neutrinos is proposed. The symmetry of the model is $SU(2)_L \times U(1)_Y \times U(1)_M$. Because of the mixing of neutrinos, the conversion of one lepton type to another is possible, but many of those kind processes are of extremely small possibilities. The total lepton-number conservation still holds in this model, so neutrinoless double beta decay is prohibited. Though right-hand neutrinos are introduced into the model, their coupling with matter fields is extremely small and therefore they are much harder to be detected in experiments.