Multi-axion like description of the dark sector in light of the Hubble and $σ_8$ tensions
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Acceso en línea: | |
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| _version_ | 1866916605553803264 |
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| author | Dumancic, John Gass, Richard Mawas, Ennis Wijewardhana, L. C. R. |
| author_facet | Dumancic, John Gass, Richard Mawas, Ennis Wijewardhana, L. C. R. |
| contents | Local methods of direct determination of the Hubble constant and $σ_8$ seem to conflict with the predictions made from the cosmic microwave background and $Λ$CDM. We propose a proof-of-concept model that models portions of the dark sector as several coupled axion-like fields, resulting in both early and late time departures from $Λ$CDM. We determine that the model successfully eliminates both the Hubble and $σ_8$ tensions, while remaining consistent with both the DESI survey and the BAO sound horizon. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_08391 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Multi-axion like description of the dark sector in light of the Hubble and $σ_8$ tensions Dumancic, John Gass, Richard Mawas, Ennis Wijewardhana, L. C. R. Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology High Energy Physics - Theory Local methods of direct determination of the Hubble constant and $σ_8$ seem to conflict with the predictions made from the cosmic microwave background and $Λ$CDM. We propose a proof-of-concept model that models portions of the dark sector as several coupled axion-like fields, resulting in both early and late time departures from $Λ$CDM. We determine that the model successfully eliminates both the Hubble and $σ_8$ tensions, while remaining consistent with both the DESI survey and the BAO sound horizon. |
| title | Multi-axion like description of the dark sector in light of the Hubble and $σ_8$ tensions |
| topic | Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2501.08391 |