CAST constraints on the axion-electron coupling
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-recombinatio...
Gespeichert in:
Veröffentlicht in: | Journal of cosmology and astroparticle physics 2013-05, Vol.2013 (5), p.i-15 |
---|---|
Hauptverfasser: | , , , , , , , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | 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) and axion-photon interaction strength g sub(a[gamma]) using the CAST phase-I data (vacuum phase). For m sub(a) [< ~] 10 meV/c super(2) we find g sub(a[gamma]) g sub(ae) < 8.1 x 10 super(-23) GeV super(-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. |
---|---|
ISSN: | 1475-7516 1475-7516 |
DOI: | 10.1088/1475-7516/2013/05/010 |