Fingerprints of freeze-in dark matter in an early matter-dominated era
We study the impact of an alternate cosmological history with an early matter-dominated epoch on the freeze-in production of dark matter. Such early matter domination is triggered by a meta-stable matter field dissipating into radiation. In general, the dissipation rate has a non-trivial temperat...
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| Format: | Article |
| Language: | English |
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SciPost
2022-08-01
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| Series: | SciPost Physics |
| Online Access: | https://scipost.org/SciPostPhys.13.2.022 |
| _version_ | 1811215335228964864 |
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| author | Avik Banerjee, Debtosh Chowdhury |
| author_facet | Avik Banerjee, Debtosh Chowdhury |
| author_sort | Avik Banerjee, Debtosh Chowdhury |
| collection | DOAJ |
| description | We study the impact of an alternate cosmological history with an early
matter-dominated epoch on the freeze-in production of dark matter. Such early
matter domination is triggered by a meta-stable matter field dissipating into
radiation. In general, the dissipation rate has a non-trivial temperature and
scale factor dependence. Compared to the usual case of dark matter production
via the freeze-in mechanism in a radiation-dominated universe, in this
scenario, orders of magnitude larger coupling between the visible and the dark
sector can be accommodated. Finally, as a proof of principle, we consider a
specific model where the dark matter is produced by a sub-GeV dark photon
having a kinetic mixing with the Standard Model photon. We point out that the
parameter space of this model can be probed by the experiments in the presence
of an early matter-dominated era. |
| first_indexed | 2024-04-12T06:19:52Z |
| format | Article |
| id | doaj.art-f23d2d91f1c7497988ae710c89142665 |
| institution | Directory Open Access Journal |
| issn | 2542-4653 |
| language | English |
| last_indexed | 2024-04-12T06:19:52Z |
| publishDate | 2022-08-01 |
| publisher | SciPost |
| record_format | Article |
| series | SciPost Physics |
| spelling | doaj.art-f23d2d91f1c7497988ae710c891426652022-12-22T03:44:21ZengSciPostSciPost Physics2542-46532022-08-0113202210.21468/SciPostPhys.13.2.022Fingerprints of freeze-in dark matter in an early matter-dominated eraAvik Banerjee, Debtosh ChowdhuryWe study the impact of an alternate cosmological history with an early matter-dominated epoch on the freeze-in production of dark matter. Such early matter domination is triggered by a meta-stable matter field dissipating into radiation. In general, the dissipation rate has a non-trivial temperature and scale factor dependence. Compared to the usual case of dark matter production via the freeze-in mechanism in a radiation-dominated universe, in this scenario, orders of magnitude larger coupling between the visible and the dark sector can be accommodated. Finally, as a proof of principle, we consider a specific model where the dark matter is produced by a sub-GeV dark photon having a kinetic mixing with the Standard Model photon. We point out that the parameter space of this model can be probed by the experiments in the presence of an early matter-dominated era.https://scipost.org/SciPostPhys.13.2.022 |
| spellingShingle | Avik Banerjee, Debtosh Chowdhury Fingerprints of freeze-in dark matter in an early matter-dominated era SciPost Physics |
| title | Fingerprints of freeze-in dark matter in an early matter-dominated era |
| title_full | Fingerprints of freeze-in dark matter in an early matter-dominated era |
| title_fullStr | Fingerprints of freeze-in dark matter in an early matter-dominated era |
| title_full_unstemmed | Fingerprints of freeze-in dark matter in an early matter-dominated era |
| title_short | Fingerprints of freeze-in dark matter in an early matter-dominated era |
| title_sort | fingerprints of freeze in dark matter in an early matter dominated era |
| url | https://scipost.org/SciPostPhys.13.2.022 |
| work_keys_str_mv | AT avikbanerjeedebtoshchowdhury fingerprintsoffreezeindarkmatterinanearlymatterdominatedera |