Four-Family ${\cal N}=1$ Supersymmetric Pati-Salam Models from Intersecting D6-Branes

TL;DR

This paper constructs four-family supersymmetric Pati-Salam models from intersecting D6-branes in Type IIA string theory, identifying models with gauge coupling unification and potential for supersymmetry breaking and moduli stabilization.

Contribution

It introduces a systematic algorithm to generate and classify four-family supersymmetric Pati-Salam models with various torus configurations and gauge coupling relations.

Findings

274 models with three rectangular tori identified

6 models with two rectangular and one tilted torus found

Models with gauge coupling unification and supersymmetry breaking potential

Abstract

We investigate the construction of four-family ${\cal N}=1$ supersymmetric Pati-Salam models from Type IIA $\mathbb{T}^6/(\mathbb{Z}_2 \times \mathbb{Z}_2)$ orientifold with intersecting D6-branes. Utilizing the deterministic algorithm introduced in Ref. \cite{heCompleteSearchSupersymmetric2021}, we obtain $274$ types of models with three rectangular tori and distinct gauge coupling relations at string scale, while $6$ types of models with two rectangular tori and one titled torus. In both cases, there exists a class of models with gauge coupling unification at string scale. In particular, for the models with two rectangular tori, one tilted torus and gauge coupling unification, the gaugino condensations are allowed, and thus supersymmetry breaking and moduli stabilization are possible for further phenomenological study.