Kinetic recoupling of dark matter
Fuente:
arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| _version_ | 1866909262581596160 |
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| author | Lehmann, Benjamin V. Morrison, Logan Profumo, Stefano Smyth, Nolan |
| author_facet | Lehmann, Benjamin V. Morrison, Logan Profumo, Stefano Smyth, Nolan |
| contents | We study the possibility that dark matter re-enters kinetic equilibrium with a radiation bath after kinetic decoupling, a scenario we dub kinetic recoupling. This naturally occurs, for instance, with certain types of resonantly-enhanced interactions, or as the result of a phase transition. While late kinetic decoupling damps structure on small scales below a cutoff, kinetic recoupling produces more complex changes in the power spectrum that depend on the nature and extent of the recoupling period. We explore the features that kinetic recoupling imprints upon the matter power spectrum, and discuss how such features can be traced to dark matter microphysics with future observations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_20513 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Kinetic recoupling of dark matter Lehmann, Benjamin V. Morrison, Logan Profumo, Stefano Smyth, Nolan High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics We study the possibility that dark matter re-enters kinetic equilibrium with a radiation bath after kinetic decoupling, a scenario we dub kinetic recoupling. This naturally occurs, for instance, with certain types of resonantly-enhanced interactions, or as the result of a phase transition. While late kinetic decoupling damps structure on small scales below a cutoff, kinetic recoupling produces more complex changes in the power spectrum that depend on the nature and extent of the recoupling period. We explore the features that kinetic recoupling imprints upon the matter power spectrum, and discuss how such features can be traced to dark matter microphysics with future observations. |
| title | Kinetic recoupling of dark matter |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2310.20513 |