Dilaton Stabilization in Three-generation Heterotic String Model

TL;DR

This paper constructs a specific heterotic string model with three generations where the dilaton is stabilized via the racetrack mechanism, and explores supersymmetry breaking and F-term uplifting.

Contribution

It presents an explicit three-generation heterotic string model with dilaton stabilization and discusses related supersymmetry breaking scenarios.

Findings

Dilaton stabilized by racetrack mechanism in the model

Model contains the supersymmetric standard model plus vectorlike matter

Analysis of supersymmetry breaking and F-term uplifting scenarios

Abstract

We study dilaton stabilization in heterotic string models. By utilizing the asymmetric orbifold construction, we construct an explicit three-generation model whose matter content in the visible sector is the supersymmetric standard model with additional vectorlike matter. This model does not contain any geometric moduli fields except the dilaton field. Model building at a symmetry enhancement point in moduli space enlarges the rank of the hidden gauge group. By analyzing multiple hidden gauge sectors, the dilaton field is stabilized by the racetrack mechanism. We also discuss a supersymmetry breaking scenario and F-term uplifting.