期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2014/01/011
关键词
axions; particle physics - cosmology connection
资金
- UNILHC [PITN-GA-2009-23792]
- Spanish Ministry of Economy and Competitiveness Consolider-CPAN [CSD2007-00042]
- Centro de Excelencia Severo Ochoa Programme [SEV-2012-0249]
- C.A. de Madrid [HEPHACOS-S2009/ESP1473]
- ESF [MTT8]
- [SF0690030s09]
We reconsider thermal production of axions in the early universe, including axion couplings to all Standard Model (SM) particles. Concerning the axion coupling to gluons, we find that thermal effects enhance the axion production rate by a factor of few with respect to previous computations performed in the limit of small strong gauge coupling. Furthermore, we find that the top Yukawa coupling induces a much larger axion production rate, unless the axion couples to SM particles only via anomalies.
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