Misalignment production of vector boson dark matter from axion-SU(2) inflation
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| Main Authors: | , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866929302874882048 |
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| author | Fujita, Tomohiro Murai, Kai Nakayama, Kazunori Yin, Wen |
| author_facet | Fujita, Tomohiro Murai, Kai Nakayama, Kazunori Yin, Wen |
| contents | We present a new mechanism to generate a coherently oscillating dark vector field from axion-SU(2) gauge field dynamics during inflation. The SU(2) gauge field acquires a nonzero background sourced by an axion during inflation, and it acquires a mass through spontaneous symmetry breaking after inflation. We find that the coherent oscillation of the dark vector field can account for dark matter in the mass range of $10^{-13}-1$ eV in a minimal setup. In a more involved scenario, the range can be wider down to the fuzzy dark matter region. One of the dark vector fields can be identified as the dark photon, in which case this mechanism evades the notorious constraints for isocurvature perturbation, statistical anisotropy, and the absence of ghosts that exist in the usual misalignment production scenarios. Phenomenological implications are discussed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_06889 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Misalignment production of vector boson dark matter from axion-SU(2) inflation Fujita, Tomohiro Murai, Kai Nakayama, Kazunori Yin, Wen High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics We present a new mechanism to generate a coherently oscillating dark vector field from axion-SU(2) gauge field dynamics during inflation. The SU(2) gauge field acquires a nonzero background sourced by an axion during inflation, and it acquires a mass through spontaneous symmetry breaking after inflation. We find that the coherent oscillation of the dark vector field can account for dark matter in the mass range of $10^{-13}-1$ eV in a minimal setup. In a more involved scenario, the range can be wider down to the fuzzy dark matter region. One of the dark vector fields can be identified as the dark photon, in which case this mechanism evades the notorious constraints for isocurvature perturbation, statistical anisotropy, and the absence of ghosts that exist in the usual misalignment production scenarios. Phenomenological implications are discussed. |
| title | Misalignment production of vector boson dark matter from axion-SU(2) inflation |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2312.06889 |