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28 March 2024
 
  » arxiv » 1302.6283

 Article overview


CAST constraints on the axion-electron coupling
K. Barth ; A. Belov ; B. Beltran ; H. Brauninger ; J. M. Carmona ; J.I. Collar ; T. Dafni ; M. Davenport ; L. Di Lella ; C. Eleftheriadis ; J. Englhauser ; G. Fanourakis ; E. Ferrer Ribas ; H. Fischer ; J. Franz ; P. Friedrich ; J. Galan ; J. A. Garcia ; T. Geralis ; I. Giomataris ; S. Gninenko ; H. Gomez ; M. D. Hassinoff ; F. H. Heinsius ; D. H. H. Hoffmann ; I.G. Irastorza ; J. Jacoby ; K. Jakovcic ; D. Kang ; K. Konigsmann ; R. Kotthaus ; K. Kousouris ; M. Krcmar ; M. Kuster ; B. Lakic ; A. Liolios ; A. Ljubicic ; G. Lutz ; G. Luzon ; D.W. Miller ; T. Papaevangelou ; M.J. Pivovaroff ; G. Raffelt ; J. Redondo ; H. Riege ; A. Rodriguez ; J. Ruz ; I. Savvidis ; Y. Semertzidis ; L. Stewart ; K. Van Bibber ; J.D. Vieira ; J.A. Villar ; J.K. Vogel ; L. Walckiers ; K. Zioutas ;
Date 26 Feb 2013
AbstractIn non-hadronic axion models, which have a tree-level axion-electron interaction, the Sun produces a strong axion flux by bremsstrahlung, Compton scattering, and axio-recombination, the "BCA processes." Based on a new calculation of this flux, including for the first time axio-recombination, we derive limits on the axion-electron Yukawa coupling g_ae and axion-photon interaction strength g_ag using the CAST phase-I data (vacuum phase). For m_a < 10 meV/c2 we find g_ag x g_ae< 8.1 x 10^-23 GeV^-1 at 95% CL. We stress that a next-generation axion helioscope such as the proposed IAXO could push this sensitivity into a range beyond stellar energy-loss limits and test the hypothesis that white-dwarf cooling is dominated by axion emission.
Source arXiv, 1302.6283
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