Search for 14.4 keV solar axions emitted in the M1-transition of 57Fe nuclei with CAST

S. Andriamonje, S. Aune, D. Autiero, K. Barth, A. Belov, B. Beltrn, H. Bräuninger, J. M. Carmona, S. Cebrin, J. I. Collar, T. Dafni, M. Davenport, L. Lella, C. Eleftheriadis, J. Englhauser, G. Fanourakis, E. Ferrer-Ribas, H. Fischer, J. Franz, P. FriedrichT. Geralis, I. Giomataris, S. Gninenko, H. Gómez, M. Hasinoff, F. H. Heinsius, D. H.H. Hoffmann, I. G. Irastorza, J. Jacoby, K. Jakovčić, D. Kang, K. Königsmann, R. Kotthaus, M. Krcmar, K. Kousouris, M. Kuster, B. Lakić, C. Lasseur, A. Liolios, A. Ljubiičić, G. Lutz, G. Luzón, D. Miller, J. Morales, A. Ortiz, T. Papaevangelou, A. Placci, G. Raffelt, H. Riege, A. Rodríguez, J. Ruz, I. Savvidis, Y. Semertzidis, P. Serpico, L. Stewart, J. Vieira, J. Villar, J. Vogel, L. Walckiers, K. Zioutas

Research output: Contribution to journalArticlepeer-review


We have searched for 14.4 keV solar axions or more general axion-like particles (ALPs), that may be emitted in the M1 nuclear transition of 57Fe, by using the axion-to-photon conversion in the CERN Axion Solar Telescope (CAST) with evacuated magnet bores (Phase I). From the absence of excess of the monoenergetic X-rays when the magnet was pointing to the Sun, we set model-independent constraints on the coupling constants of pseudoscalar particles that couple to two photons and to a nucleon g |-1. 19g aN 0+g aN 3| < 1.36 × 10 -16 GeV -1 for m a < 0.03 eV at the 95% confidence level.

Original languageEnglish (US)
Article number002
JournalJournal of Cosmology and Astroparticle Physics
Issue number12
StatePublished - 2009
Externally publishedYes


  • Axions
  • Solar physics

ASJC Scopus subject areas

  • Astronomy and Astrophysics


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