Self-Interacting Dark Sectors in Supernovae Can Behave as a Relativistic Fluid
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arXiv
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| Autori principali: | , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| author | Fiorillo, Damiano F. G. Vitagliano, Edoardo |
| author_facet | Fiorillo, Damiano F. G. Vitagliano, Edoardo |
| contents | We revisit supernova (SN) bounds on a hidden sector consisting of millicharged particles $χ$ and a massless dark photon. Unless the self-coupling is fine-tuned to be small, rather than exiting the SN core as a gas, the particles form a relativistic fluid and subsequent dark QED fireball, streaming out against the drag due to the interaction with matter. Novel bounds due to excessive energy deposition in the mantle of low-energy SNe can be obtained. The cooling bounds from SN 1987A are unexpectedly not affected in the free-streaming regime. The inclusion of $χ\barχ\rightarrow \rm SM$ substantially modifies the constraints in the trapping regime, which can only be treated hydrodynamically. Our results can be adapted to generic sub-GeV self-interacting dark sectors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_07714 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Self-Interacting Dark Sectors in Supernovae Can Behave as a Relativistic Fluid Fiorillo, Damiano F. G. Vitagliano, Edoardo High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics High Energy Astrophysical Phenomena We revisit supernova (SN) bounds on a hidden sector consisting of millicharged particles $χ$ and a massless dark photon. Unless the self-coupling is fine-tuned to be small, rather than exiting the SN core as a gas, the particles form a relativistic fluid and subsequent dark QED fireball, streaming out against the drag due to the interaction with matter. Novel bounds due to excessive energy deposition in the mantle of low-energy SNe can be obtained. The cooling bounds from SN 1987A are unexpectedly not affected in the free-streaming regime. The inclusion of $χ\barχ\rightarrow \rm SM$ substantially modifies the constraints in the trapping regime, which can only be treated hydrodynamically. Our results can be adapted to generic sub-GeV self-interacting dark sectors. |
| title | Self-Interacting Dark Sectors in Supernovae Can Behave as a Relativistic Fluid |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2404.07714 |