CAST constraints on the axion-electron coupling

2013/02/28 by K. Barth, A. Belov, А. С. Белов +78 · 3 citations
Physics and Astronomy · #Axion #Bremsstrahlung #Compton scattering #Cosmology and Gravitation Theories #Coupling (piping) #Dark Matter and Cosmic Phenomena #Dark matter #Electron #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Photon #Physics #Quantum mechanics #Yukawa potential #astro-ph.SR #hep-ph

paper · pdf · doi:10.1088/1475-7516/2013/05/010

published as JCAP 1305 (2013) 010

arxiv created 2013/04/19 · openalex publication_date 2013/05/09 · arxiv updated 2015/02/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06

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 g ae and axion-photon interaction strength g a γ using the CAST phase-I data (vacuum phase). For m a ≲10 meV/ c 2 we find g a γ g ae < 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.

Citations

• Axion Mass Limits from Cooling Neutron Stars
• Revisiting the Impact of Axions in the Cooling of White Dwarfs
• The Micromegas detector of the CAST experiment
• A simple solution to the strong CP problem with a harmless axion
• Search for solar axion emission from7Li and D(p, γ)3He nuclear decays with the CAST γ-ray calorimeter
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• Probing eV-scale axions with CAST
• The x-ray telescope of CAST
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• Axion-Higgs unification
• Review of Particle Physics
• Exploring the Role of Axions and Other WISPs in the Dark Universe
• White dwarfs as physics laboratories: the case of axions
• String axiverse
• Review of Multibody Charm Analyses

Cited by

• Axion hot dark matter bounds after Planck
• Solar Axions Cannot Explain the XENON1T Excess
• Axion astrophysics