Thermal axion production at hard and soft momenta
Abstract Hot axions, thermally produced in the Early Universe, would contribute to dark radiation and are thus subject to present and future constraints from N eff. In this paper we quantify the contribution to N eff and its uncertainty in models with axion-gluon couplings from thermal dynamics abov...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2025-01-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP01(2025)163 |
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