Minimal String Unification and Hidden Sector in Z_8 Orbifold Models

TL;DR

This paper investigates minimal supersymmetric standard models from Z_8 orbifold constructions, focusing on hidden sectors and gauge coupling unification, with implications for supersymmetry breaking via gaugino condensation.

Contribution

It introduces a method to identify consistent hidden sectors in Z_8 orbifold models using anomaly cancellation and estimates gauge couplings considering threshold corrections.

Findings

Identified hidden sectors compatible with MSSM unification.

Estimated gauge coupling constants with threshold corrections.

Discussed implications for supersymmetry breaking mechanisms.

Abstract

We study the minimal supersymmetric standard model derived from the $Z_8$ orbifold models and its hidden sectors. We use a target-space duality anomaly cancellation so as to investigate hidden sectors consistent with the MSSM unification. For the allowed hidden sectors, we estimate the running gauge coupling constants making use of threshold corrections due to the higher massive modes. The calculation is important from the viewpoint of gaugino condensations, which is one of the most promissing mechanism to break the supersymmetry.