Thermal Axions: What’s next?
Scattering and decay processes of thermal bath particles in the early universe can dump relativistic axions in the primordial plasma. If produced with a significant abundance, their presence can leave observable signatures in cosmological observables probing both the early and the late universe. We...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2022-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://www.epj-conferences.org/articles/epjconf/pdf/2022/18/epjconf_confxv2022_01007.pdf |
| _version_ | 1797951179552980992 |
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| author | D’Eramo Francesco |
| author_facet | D’Eramo Francesco |
| author_sort | D’Eramo Francesco |
| collection | DOAJ |
| description | Scattering and decay processes of thermal bath particles in the early universe can dump relativistic axions in the primordial plasma. If produced with a significant abundance, their presence can leave observable signatures in cosmological observables probing both the early and the late universe. We focus on the QCD axion and present recent and significant improvements for the calculation of the axion production rate across the different energy scales during the expansion of the universe. We apply these rates to predict the abundance of produced axions and to derive the latest cosmological bounds on the axion mass and couplings. |
| first_indexed | 2024-04-10T22:26:32Z |
| format | Article |
| id | doaj.art-ae180a0d28f04962ac45011d2005f911 |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-04-10T22:26:32Z |
| publishDate | 2022-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-ae180a0d28f04962ac45011d2005f9112023-01-17T09:14:36ZengEDP SciencesEPJ Web of Conferences2100-014X2022-01-012740100710.1051/epjconf/202227401007epjconf_confxv2022_01007Thermal Axions: What’s next?D’Eramo Francesco0Dipartimento di Fisica e Astronomia, Università degli Studi di PadovaScattering and decay processes of thermal bath particles in the early universe can dump relativistic axions in the primordial plasma. If produced with a significant abundance, their presence can leave observable signatures in cosmological observables probing both the early and the late universe. We focus on the QCD axion and present recent and significant improvements for the calculation of the axion production rate across the different energy scales during the expansion of the universe. We apply these rates to predict the abundance of produced axions and to derive the latest cosmological bounds on the axion mass and couplings.https://www.epj-conferences.org/articles/epjconf/pdf/2022/18/epjconf_confxv2022_01007.pdf |
| spellingShingle | D’Eramo Francesco Thermal Axions: What’s next? EPJ Web of Conferences |
| title | Thermal Axions: What’s next? |
| title_full | Thermal Axions: What’s next? |
| title_fullStr | Thermal Axions: What’s next? |
| title_full_unstemmed | Thermal Axions: What’s next? |
| title_short | Thermal Axions: What’s next? |
| title_sort | thermal axions what s next |
| url | https://www.epj-conferences.org/articles/epjconf/pdf/2022/18/epjconf_confxv2022_01007.pdf |
| work_keys_str_mv | AT deramofrancesco thermalaxionswhatsnext |