CAST constraints on the axion-electron coupling [electronic resource].
- Washington, D.C. : United States. Dept. of Energy, 2013.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
- Physical Description:
- pages 010-010 : digital, PDF file
- Additional Creators:
- Lawrence Berkeley National Laboratory
United States. Department of Energy
United States. Department of Energy. Office of Scientific and Technical Information
- In 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<sub>ae</sub> and axion-photon interaction strength g<sub>aγ</sub> using the CAST phase-I data (vacuum phase). For m<sub>a</sub> ≲ 10 meV/c<sup>2</sup> we find g<sub>aγ g<sub>ae</sub> < 8.1 × 10<sup>–23</sup> GeV<sup>–1</sup> 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.
- Published through SciTech Connect.
Journal of Cosmology and Astroparticle Physics 2013 05 ISSN 1475-7516 AM
- Funding Information:
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