Thermal Axions: Production Mechanisms and Cosmological Signals
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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Andromeda Publishing and Academic Services
2023-01-01
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| Series: | Letters in High Energy Physics |
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| Online Access: | http://journals.andromedapublisher.com/index.php/LHEP/article/view/353 |
| _version_ | 1811176699851702272 |
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| author | Francesco D’Eramo |
| author_facet | Francesco D’Eramo |
| author_sort | Francesco D’Eramo |
| 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.
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| first_indexed | 2024-04-10T19:55:58Z |
| format | Article |
| id | doaj.art-62dd6ef32ca04755b4d75fa8606003bd |
| institution | Directory Open Access Journal |
| issn | 2632-2714 |
| language | English |
| last_indexed | 2024-04-10T19:55:58Z |
| publishDate | 2023-01-01 |
| publisher | Andromeda Publishing and Academic Services |
| record_format | Article |
| series | Letters in High Energy Physics |
| spelling | doaj.art-62dd6ef32ca04755b4d75fa8606003bd2023-01-28T00:17:34ZengAndromeda Publishing and Academic ServicesLetters in High Energy Physics2632-27142023-01-012022110.31526/lhep.2022.353Thermal Axions: Production Mechanisms and Cosmological SignalsFrancesco D’Eramo0University of Padua 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. http://journals.andromedapublisher.com/index.php/LHEP/article/view/353AxionsEarly UniverseDark Radiation |
| spellingShingle | Francesco D’Eramo Thermal Axions: Production Mechanisms and Cosmological Signals Letters in High Energy Physics Axions Early Universe Dark Radiation |
| title | Thermal Axions: Production Mechanisms and Cosmological Signals |
| title_full | Thermal Axions: Production Mechanisms and Cosmological Signals |
| title_fullStr | Thermal Axions: Production Mechanisms and Cosmological Signals |
| title_full_unstemmed | Thermal Axions: Production Mechanisms and Cosmological Signals |
| title_short | Thermal Axions: Production Mechanisms and Cosmological Signals |
| title_sort | thermal axions production mechanisms and cosmological signals |
| topic | Axions Early Universe Dark Radiation |
| url | http://journals.andromedapublisher.com/index.php/LHEP/article/view/353 |
| work_keys_str_mv | AT francescoderamo thermalaxionsproductionmechanismsandcosmologicalsignals |