Weak Scale in Heterotic String

TL;DR

This paper explores lowering the string scale in four-dimensional heterotic models with non-perturbative gauge groups, focusing on compactifications where gauge bosons are non-perturbative and decoupled from the Planck and string scales.

Contribution

It introduces a class of heterotic compactifications with non-perturbative gauge sectors, enabling a lower string scale independent of fundamental scales.

Findings

Gauge bosons are non-perturbative in these models.

The gauge coupling is independent of the Planck and string scales.

The models allow for a potentially lower string scale.

Abstract

We investigate the possibility of lowering the string scale in four dimensional heterotic models possessing a non-perturbative extension of the gauge group. In particular, we consider a class of compactifications in which the perturbative gauge sector is massive, and all the gauge bosons are non-perturbative, with a coupling independent on the Planck and string scales.