Natural gauge-coupling unification at the string scale

TL;DR

This paper proposes that moduli in the adjoint representation naturally present in superstring models can reconcile the difference between the string scale and the gauge coupling unification scale.

Contribution

It introduces the idea that adjoint moduli in superstring models can explain the scale discrepancy, providing a new perspective on gauge coupling unification.

Findings

Adjoint moduli are a natural feature of superstring models.

These moduli can account for the discrepancy between string and unification scales.

The approach offers a potential solution to scale mismatch issues.

Abstract

We argue that moduli in the adjoint representation of the standard- model gauge group are a natural feature of superstring models, and that they can account for the apparent discrepancy between the string and unification scales.