When Tiny Halos Stir Spacetime: Gravitational Waves from Fifth-Force Mergers
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866918160832135168 |
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| author | Wang, Xinpeng Lu, Yifan Picker, Zachary S. C. Kusenko, Alexander Sasaki, Misao |
| author_facet | Wang, Xinpeng Lu, Yifan Picker, Zachary S. C. Kusenko, Alexander Sasaki, Misao |
| contents | Dark matter fermions interacting via attractive fifth forces mediated by a light mediator can form dark matter halos in the very early universe. We show that bound systems composed of these halos are capable of generating gravitational wave (GW) signals detectable today, even when the individual halos are very light. The Yukawa force dominates the dynamics of these halo binaries, rather than gravity. As a result, large GW signals can be produced at initially extremely high frequencies, which are then redshifted to frequency bands accessible to current or future GW observatories. In addition, the resulting GW signals carry distinctive features that enable future observations to distinguish them from conventional ones. Notably, even if only a tiny fraction of dark matter experiences strong fifth-force interactions, such effects provide a new avenue to discover self-interacting dark matter through GW observations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_12984 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | When Tiny Halos Stir Spacetime: Gravitational Waves from Fifth-Force Mergers Wang, Xinpeng Lu, Yifan Picker, Zachary S. C. Kusenko, Alexander Sasaki, Misao Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology Dark matter fermions interacting via attractive fifth forces mediated by a light mediator can form dark matter halos in the very early universe. We show that bound systems composed of these halos are capable of generating gravitational wave (GW) signals detectable today, even when the individual halos are very light. The Yukawa force dominates the dynamics of these halo binaries, rather than gravity. As a result, large GW signals can be produced at initially extremely high frequencies, which are then redshifted to frequency bands accessible to current or future GW observatories. In addition, the resulting GW signals carry distinctive features that enable future observations to distinguish them from conventional ones. Notably, even if only a tiny fraction of dark matter experiences strong fifth-force interactions, such effects provide a new avenue to discover self-interacting dark matter through GW observations. |
| title | When Tiny Halos Stir Spacetime: Gravitational Waves from Fifth-Force Mergers |
| topic | Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2510.12984 |