Global Type IIA Vacuum: A Unified Model for the Standard Model and Cosmology

TL;DR

This paper presents a comprehensive Type IIA string theory model that unifies the Standard Model and cosmological phenomena through intersecting D6-branes, instantons, and moduli stabilization, addressing key issues in particle physics and cosmology.

Contribution

It introduces a globally consistent intersecting D6-brane model that simultaneously explains CP violation, baryon asymmetry, electroweak hierarchy, and de Sitter uplift within a unified string theory framework.

Findings

Realizes MSSM-like spectrum in a Type IIA compactification.

Provides mechanisms for CP violation and baryogenesis via instantons.

Achieves moduli stabilization and de Sitter uplift in a coherent model.

Abstract

We propose a unified framework within Type IIA string theory, based on a globally consistent intersecting D6-brane model compactified on a $T^6/(\mathbb{Z}_2 \times \mathbb{Z}_2)$ orientifold. The model realizes the MSSM-like spectrum providing a framework for addressing four fundamental problems: CP violation originates from both geometric phases in Yukawa couplings and non-perturbative phases induced by E2-instantons; the observed baryon asymmetry arises via instanton-mediated operators combined with moduli-driven leptogenesis; the electroweak hierarchy is stabilized through controlled SUSY breaking with a TeV-scale gravitino mass near a metastable vacuum; and a de Sitter uplift is achieved via anti-D6-branes in an STU moduli stabilization scheme. Crucially, the interplay of intersecting brane geometry, Euclidean D2-instantons, and flux-induced moduli potentials provides a coherent mechanism linking collider, flavor, and cosmological phenomena.