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Title: CAST constraints on the axion-electron coupling

Journal Article · · Journal of Cosmology and Astroparticle Physics

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 g 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.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
Contributing Organization:
CAST Collaboration
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1240066
Report Number(s):
LLNL-JRNL-621572
Journal Information:
Journal of Cosmology and Astroparticle Physics, Vol. 2013, Issue 05; ISSN 1475-7516
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 61 works
Citation information provided by
Web of Science

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Cited By (12)

Solar axion flux from the axion-electron coupling journal December 2013
First Axion Results from the XENON100 Experiment text January 2014
Axion searches with the EDELWEISS-II experiment journal November 2013
Axion-like-particle decay in strong electromagnetic backgrounds journal December 2019
Axion global fits with Peccei-Quinn symmetry breaking before inflation using GAMBIT journal March 2019
On axionic dark matter in Type IIA string theory journal January 2014
Axion global fits with Peccei-Quinn symmetry breaking before inflation using GAMBIT text January 2019
First axion results from the XENON100 experiment text January 2014
On axionic dark matter in Type IIA string theory text January 2013
Axion Dark Matter Detection using Atomic Transitions text January 2014
Towards a medium-scale axion helioscope and haloscope text January 2017
Axion-like-particle decay in strong electromagnetic backgrounds text January 2019

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