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

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

2009-06-24

arxiv.org/abs/0906.4488v2

JCAP 0912:002,2009

Physics

High Energy Physics

High Energy Physics - Experiment

23 pages, 5 figures. Revised version of the paper after referee`s comments. Main changes in the Measurement and data analysis

Scientific paper

10.1088/1475-7516/2009/12/002

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_{a\gamma} |-1.19 g_{aN}^{0}+g_{aN}^{3}|<1.36\times 10^{-16} GeV^{-1} for m_{a}<0.03 eV at the 95% confidence level.

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