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Thermal axion production

Alberto Salvio
(
- Madrid, Autonoma U. and
- Madrid, IFT
)
,
Alessandro Strumia
(
- Pisa U. and
- INFN, Pisa and
- NICPB, Tallinn
)
,
Wei Xue
(
- INFN, Trieste and
- SISSA, Trieste
)

Oct 25, 2013

16 pages

Published in:

JCAP 01 (2014) 011

Published: Jan 10, 2014

e-Print:

1310.6982 [hep-ph]

DOI:

10.1088/1475-7516/2014/01/011

Report number:

FTUAM-13-29,
IFT-UAM-CSIC-13-113

View in:

ADS Abstract Service

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Abstract: (IOP)

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.

Note:

16 pages, 5 figures. v3: we thank Daniel Green and Benjamin Wallisch for having pointed out a numerical error in the electroweak gauge contribution in fig. 5, which has been corrected

axions
particle physics - cosmology connection
axion: production
axion: coupling
axion: thermal
production: thermal
coupling: Yukawa
effect: thermal
coupling: gauge
cosmological model: parameter space

References(37)

Figures(5)

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