Freezing-in the pure dark axion portal
A Z 2 symmetry under which “dark” and “visible” fields transform differently can further seclude already dark particles. In a dark sector consisting of an axion-like particle and a dark photon the dominant interaction can then be via a dark photon-axion portal to the ordinary photon. If the axion is...
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| Main Authors: | , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
27 June 2025
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| In: |
Journal of cosmology and astroparticle physics
Year: 2025, Issue: 6, Pages: 1-32 |
| ISSN: | 1475-7516 |
| DOI: | 10.1088/1475-7516/2025/06/060 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1088/1475-7516/2025/06/060
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| Author Notes: | Paola Arias, Bastián Díaz Sáez and Joerg Jaeckel |
| Summary: | A Z 2 symmetry under which “dark” and “visible” fields transform differently can further seclude already dark particles. In a dark sector consisting of an axion-like particle and a dark photon the dominant interaction can then be via a dark photon-axion portal to the ordinary photon. If the axion is lighter than the dark photon it naturally emerges as a viable dark matter candidate. We explore its freeze-in production both in a standard high-reheating temperature and weak coupling as well as a low-reheating temperature and strong coupling regime. Cosmological constraints are taken into account to identify viable regions in parameter space. For the strong freeze-in regime, we highlight the possibility of probing it at B-factories, beam dump and collider experiments. We also briefly discuss a potential misalignment contribution to the dark matter density and delineate under which conditions it can be neglected. |
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| Item Description: | Veröffentlicht: 27. Juni 2025 Gesehen am 31.10.2025 |
| Physical Description: | Online Resource |
| ISSN: | 1475-7516 |
| DOI: | 10.1088/1475-7516/2025/06/060 |