Neutrino properties in E6 x SU(2)F SUSY GUT with spontaneous CP violation

TL;DR

This paper investigates the neutrino sector within an E6 x SU(2)F SUSY GUT framework with spontaneous CP violation, addressing previous issues with neutrino masslessness by incorporating additional operators, and aligning predictions with experimental data.

Contribution

It demonstrates that including certain operators resolves the neutrino mass problem without affecting quark and lepton sectors, maintaining consistency with experimental neutrino oscillation data.

Findings

Neutrino masses and mixings match experimental observations.

Additional operators are crucial for realistic neutrino mass generation.

The model remains consistent with quark and charged lepton sectors.

Abstract

We examined the neutrino sector in E6 x SU(2)F SUSY GUT with spontaneous CP violation. At a glance, the discrete symmetry, which is introduced in order to solve the SUSY CP problem, constrains the allowed operators too strongly for the neutrino sector to be consistent with the experimental data, i.e., the mu neutrino becomes massless as commented in the previous paper. We showed that this issue can be solved if some operators are taken into account. And we saw that such operators do not play an important role in studying quark and charged lepton sectors. The predictions on the neutrino masses and mixings are the same as the E6 models, which are consistent with various experiments on the neutrino oscillations.