Dark matter relic density in strongly interacting dark sectors with light vector mesons
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866911884287934464 |
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| author | Bernreuther, Elias Hemme, Nicoline Kahlhoefer, Felix Kulkarni, Suchita |
| author_facet | Bernreuther, Elias Hemme, Nicoline Kahlhoefer, Felix Kulkarni, Suchita |
| contents | Stable dark matter particles may arise as pseudo-Goldstone bosons from the confinement of dark quarks interacting via a non-Abelian gauge force. Their relic abundance is determined not by annihilations into visible particles but by dark pion number-changing processes within the dark sector, such as $3 π_D \to 2 π_D$. However, if the dark vector mesons $ρ_D$ are light enough for $3 π_D \to π_D ρ_D$ annihilations to be kinematically allowed, this process dominates and significantly delays freeze-out. As a result, the preferred dark matter mass scale increases and bounds from the Bullet Cluster can be evaded. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_17157 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Dark matter relic density in strongly interacting dark sectors with light vector mesons Bernreuther, Elias Hemme, Nicoline Kahlhoefer, Felix Kulkarni, Suchita High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics Stable dark matter particles may arise as pseudo-Goldstone bosons from the confinement of dark quarks interacting via a non-Abelian gauge force. Their relic abundance is determined not by annihilations into visible particles but by dark pion number-changing processes within the dark sector, such as $3 π_D \to 2 π_D$. However, if the dark vector mesons $ρ_D$ are light enough for $3 π_D \to π_D ρ_D$ annihilations to be kinematically allowed, this process dominates and significantly delays freeze-out. As a result, the preferred dark matter mass scale increases and bounds from the Bullet Cluster can be evaded. |
| title | Dark matter relic density in strongly interacting dark sectors with light vector mesons |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2311.17157 |