Proton Hexality in Local Grand Unification

TL;DR

This paper demonstrates how proton hexality, a discrete symmetry preventing rapid proton decay, can be integrated into local grand unification models within heterotic string theory, overcoming previous incompatibilities.

Contribution

It introduces a novel approach to embedding proton hexality into local grand unification frameworks in string theory, resolving prior inconsistencies.

Findings

Proton hexality can be consistently incorporated into local grand unification models.

The approach addresses the incompatibility with conventional grand unification.

This integration helps prevent rapid proton decay in supersymmetric models.

Abstract

Proton hexality is a discrete symmetry that avoids the problem of too fast proton decay in the supersymmetric extension of the standard model. Unfortunately it is inconsistent with conventional grand unification. We show that proton hexality can be incorporated in the scheme of "Local Grand Unification" discussed in the framework of model building in (heterotic) string theory.