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Thermal axion production

AuthorsSalvio, Alberto ; Strumia, Alessandro; Xue, Wei
KeywordsParticle physics - cosmology connection
Issue Date10-Jan-2014
PublisherInstitute of Physics Publishing
CitationJournal of Cosmology and Astroparticle Physics (JCAP) 01: 011 (2014)
AbstractWe 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.
Publisher version (URL)http://dx.doi.org/10.1088/1475-7516/2014/01/011
Appears in Collections:(IFT) Artículos
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