The Weak Scale Measurements Constraints on String Models

TL;DR

This paper examines how weak scale measurements constrain various minimal superstring models, proposing intermediate gauge symmetry breaking schemes and discussing the stricter experimental limits on string unification compared to other models.

Contribution

It introduces intermediate gauge symmetry breaking models and analyzes the constraints on string unification scales from experimental data.

Findings

String unification is more experimentally restricted than other unification models.

Proposes schemes to predict GUT and SUSY breaking scales in string models.

Discusses constraints on minimal superstring and SUSY models.

Abstract

The derived modular invariant one-loop string effective coupling constant has been used to discuss the weak scale measurement constraints on minimal superstring models, minimal SUSY left-right string models and minimal left-right SUSY string models. The string intermediate gauge symmetry breaking models are proposed. The possible schemes to predict $M_{GUT} = 10^{16}GeV$ and $M_{SUSY}= 1 TeV$ in string models have been discussed. It is also demonstrated that string unification is more restricted by the experiments than any other unification models are.