Phys. Rev. Lett. 59, 2489–2492 (1987)Early-Universe Thermal Production of Not-So-Invisible AxionsSee Also: Erratum Received 29 October 1987; published in the issue dated 23 November 1987 We find that for Peccei-Quinn symmetry-breaking scales ≲4×108 GeV (corresponding to axion masses ≳0.03 eV) thermal production of axions in the early Universe (via the Primakoff and photoproduction processes) dominates coherent production by a factor of about 1200[ma/(1 eV)]2.175. The photon luminosity from the decays of these relic axions leads to an upper limit to the axion mass of order 2-5 eV. If the axion mass saturates this bound, relic axion decays may well be detectable. © 1987 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.59.2489
DOI:
10.1103/PhysRevLett.59.2489
PACS:
95.30.Cq, 14.80.Gt, 95.85.Kr, 98.80.Cq
See AlsoErratum: Michael S. Turner, Early-Universe Thermal Production of Not-So-Invisible Axions, Phys. Rev. Lett. 60, 1101 (1988). |
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.