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Title: CAST constraints on the axion-electron coupling

Abstract

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 gae and axion-photon interaction strength g using the CAST phase-I data (vacuum phase). For ma ≲ 10 meV/c2 we find gaγ gae < 8.1 × 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.

Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1240066
Report Number(s):
LLNL-JRNL-621572
Journal ID: ISSN 1475-7516
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2013; Journal Issue: 05; Journal ID: ISSN 1475-7516
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; axions; helioscopes; sun; magnetic fields; white dwarfs

Citation Formats

CAST constraints on the axion-electron coupling. United States: N. p., 2013. Web. doi:10.1088/1475-7516/2013/05/010.
CAST constraints on the axion-electron coupling. United States. doi:10.1088/1475-7516/2013/05/010.
Thu . "CAST constraints on the axion-electron coupling". United States. doi:10.1088/1475-7516/2013/05/010. https://www.osti.gov/servlets/purl/1240066.
@article{osti_1240066,
title = {CAST constraints on the axion-electron coupling},
author = {None, None},
abstractNote = {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 gae and axion-photon interaction strength gaγ using the CAST phase-I data (vacuum phase). For ma ≲ 10 meV/c2 we find gaγ gae < 8.1 × 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.},
doi = {10.1088/1475-7516/2013/05/010},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 05,
volume = 2013,
place = {United States},
year = {2013},
month = {5}
}

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Cited by: 16 works
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    Works referencing / citing this record:

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