Dilaton stabilization in three-generation heterotic string model

Florian Beye,Shogo Kuwakino,Tatsuo Kobayashi

doi:10.1016/j.physletb.2016.06.036

Dilaton stabilization in three-generation heterotic string model

Florian Beye, Shogo Kuwakino + Show 1 more

Open Access

https://doi.org/10.1016/j.physletb.2016.06.036

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Journal: Physics Letters B	Publication Date: Jun 21, 2016
Citations: 2	License type: cc-by

Affiliation: Kyoto Sangyo University, Hokkaido University

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.

Highlights

Superstring theory provides a comprehensive way to unify a model of particle physics and gravitational theory in a quantum theory
In the Kachru-Kallosh-Linde-Trivedi scenario of type IIB orientifolds [2], complex structure moduli fields as well as the dilaton field are stabilized by inclusions of 3-form fluxes among compactified internal spaces, and Kahler moduli fields can be stabilized by nonperturbative effects caused by hidden sector dynamics
We have studied dilaton stabilization by using an explicit model

Summary

Introduction

Superstring theory provides a comprehensive way to unify a model of particle physics and gravitational theory in a quantum theory. In order to make string-derived models phenomenologically realistic, moduli stabilization and supersymmetry (SUSY) breaking in the low energy effective theory should be addressed. These issues have been studied extensively in D-brane string models (see for a review [1]). We consider moduli stabilization in heterotic string models from the asymmetric orbifold construction [7]. In this formalism, the rank of gauge symmetry is enhanced: it attains the maximum allowed value of 22, since we make models from a Narain lattice that corresponds to a symmetry enhancement point in moduli space.

Three-generation asymmetric orbifold model

Racetrack potential

SUSY breaking and uplifting

Conclusion