Grand Unification with and without Supersymmetry

TL;DR

This paper reviews SO(10) grand unified theories, analyzing their predictions for fermion masses and mixings in light of recent neutrino data, comparing supersymmetric and non-supersymmetric models.

Contribution

It provides a comprehensive reexamination of SO(10) GUT relations with updated neutrino data, highlighting differences between supersymmetric and non-supersymmetric frameworks.

Findings

SO(10) models predict testable fermion mass relations

Recent neutrino data constrains GUT models

Supersymmetric and non-supersymmetric models show distinct features

Abstract

Grand Unified Theories based on the group SO(10) generically provide interesting and testable relations between the charged fermions and neutrino sector masses and mixings. In the light of the recent neutrino data, we reexamine these relations both in supersymmetric and non-supersymmetric models, and give a brief review of their present status.