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

2009/06/30 by CAST Collaboration, S. Andriamonje, S. Aune +58 · 1 citation
Physics and Astronomy · #hep-ex

paper · pdf · doi:10.1088/1475-7516/2009/12/002

published as JCAP 0912:002,2009 · 23 pages, 5 figures. Revised version of the paper after referee`s comments. Main changes in the Measurement and data analysis section

Abstract

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_aγ |-1.19 g_aN⁰+g_aN³|<1.36× 10^-16 GeV^-1 for m_a<0.03 eV at the 95% confidence level.

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