A pr 2 00 5 New cosmological mass limit on thermal relic axions

@inproceedings{Hannestad2005AP2,
  title={A pr 2 00 5 New cosmological mass limit on thermal relic axions},
  author={Steen Hannestad and Alessandro Mirizzi and Georg G. Raffelt},
  year={2005}
}
Observations of the cosmological large-scale structure provide wellestablished neutrino mass limits. We extend this argument to thermal relic axions. We calculate the axion thermal freeze-out temperature and thus their cosmological abundance on the basis of their interaction with pions. For hadronic axions we find a new mass limit ma < 1.05 eV (95% CL… CONTINUE READING