Axion Stabilization in Modular Cosmology
Fuente:
arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866916785466376192 |
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| author | Carrasco, John Joseph Kallosh, Renata Linde, Andrei Roest, Diederik |
| author_facet | Carrasco, John Joseph Kallosh, Renata Linde, Andrei Roest, Diederik |
| contents | The $SL(2,\mathbb{Z})$ invariant $α$-attractor models have plateau potentials with respect to the inflaton and axion fields. The potential in the axion direction is almost exactly flat during inflation, hence, the axion field remains nearly massless. In this paper, we develop a generalized class of such models, where the $SL(2,\mathbb{Z})$ symmetry is preserved, but the axion acquires a large mass and becomes strongly stabilized during inflation, which eliminates isocurvature perturbations in this scenario. Inflation in such two-field models occurs as in the single-field $α$-attractors and leads to the same cosmological predictions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_14904 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Axion Stabilization in Modular Cosmology Carrasco, John Joseph Kallosh, Renata Linde, Andrei Roest, Diederik High Energy Physics - Theory Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology The $SL(2,\mathbb{Z})$ invariant $α$-attractor models have plateau potentials with respect to the inflaton and axion fields. The potential in the axion direction is almost exactly flat during inflation, hence, the axion field remains nearly massless. In this paper, we develop a generalized class of such models, where the $SL(2,\mathbb{Z})$ symmetry is preserved, but the axion acquires a large mass and becomes strongly stabilized during inflation, which eliminates isocurvature perturbations in this scenario. Inflation in such two-field models occurs as in the single-field $α$-attractors and leads to the same cosmological predictions. |
| title | Axion Stabilization in Modular Cosmology |
| topic | High Energy Physics - Theory Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2503.14904 |