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| Format: | Preprint |
| Published: |
2026
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| Online Access: | https://arxiv.org/abs/2603.18566 |
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| _version_ | 1866908981803352064 |
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| author | Liu, Yang |
| author_facet | Liu, Yang |
| contents | We present a study of dark matter and the strong CP problem within a globally consistent framework of Type IIA string theory, compactified on a $T^6/(\mathbb{Z}_2 \times \mathbb{Z}_2)$ orientifold with intersecting D6-branes (Model A), for which we provide a complete moduli stabilization and supersymmetry breaking scenario based on the STU model and the KL mechanism. This setup naturally gives rise to a 3-generation MSSM-like spectrum with $\mathcal{N}=1$ supersymmetry. Phenomenologically, the model predicts a multi-component dark matter scenario comprising both axions and neutralino. We also explore how to embed the four-form flux mechanism into Type IIA $T^6/(\mathbb{Z}_2 \times \mathbb{Z}_2)$ orientifold string theory model to address the strong CP problem. We compute the relic abundance of these candidates and explore their observational signatures. In conclusion, our analysis provides a concrete unified, UV-complete framework that successfully addresses two of the most important problems in particle physics and cosmology. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_18566 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Dark Matter and Strong CP Problem in Type IIA String Theory Liu, Yang High Energy Physics - Theory We present a study of dark matter and the strong CP problem within a globally consistent framework of Type IIA string theory, compactified on a $T^6/(\mathbb{Z}_2 \times \mathbb{Z}_2)$ orientifold with intersecting D6-branes (Model A), for which we provide a complete moduli stabilization and supersymmetry breaking scenario based on the STU model and the KL mechanism. This setup naturally gives rise to a 3-generation MSSM-like spectrum with $\mathcal{N}=1$ supersymmetry. Phenomenologically, the model predicts a multi-component dark matter scenario comprising both axions and neutralino. We also explore how to embed the four-form flux mechanism into Type IIA $T^6/(\mathbb{Z}_2 \times \mathbb{Z}_2)$ orientifold string theory model to address the strong CP problem. We compute the relic abundance of these candidates and explore their observational signatures. In conclusion, our analysis provides a concrete unified, UV-complete framework that successfully addresses two of the most important problems in particle physics and cosmology. |
| title | Dark Matter and Strong CP Problem in Type IIA String Theory |
| topic | High Energy Physics - Theory |
| url | https://arxiv.org/abs/2603.18566 |