Revisiting longitudinal plasmon-axion conversion in external magnetic fields
arXiv:2005.00078 · doi:10.1103/PhysRevD.101.123004
Abstract
In the presence of an external magnetic field the axion and the photon mix. In particular, the dispersion relation of a longitudinal plasmon always crosses the dispersion relation of the axion (for small axion masses), thus leading to a resonant conversion. Using thermal field theory we concisely derive the axion emission rate, applying it to astrophysical and laboratory scenarios. For the Sun, depending on the magnetic field profile plasmon-axion conversion can dominate over Primakoff production at low energies (eV). This both provides a new axion source for future helioscopes and, in the event of discovery, would probe the magnetic field structure of the Sun. In the case of white dwarfs (WDs), plasmon-axion conversion provides a pure photon coupling probe of the axion, which may contribute significantly for low-mass WDs. Finally we rederive and confirm the axion absorption rate of the recently proposed plasma haloscopes.
Matches published version. 14 pages, 8 figures
References in corpus (11)
- Dark Matter Candidates from Particle Physics and Methods of Detection
- Bosonic super-WIMPs as keV-scale dark matter
- Stellar cooling bounds on new light particles: plasma mixing effects
- Stellar Recipes for Axion Hunters
- Revisiting the axion bounds from the Galactic white dwarf luminosity function
- The Need for Purely Laboratory-Based Axion-Like Particle Searches
- New Constraints on Sterile Neutrino Dark Matter from M31 Observations
- Strongly magnetized cold electron degenerate gas: Mass-radius relation of the magnetized white dwarf
- Axion-photon conversion caused by dielectric interfaces: quantum field calculation
- Solar neutrino flux at keV energies
- Photon & Axion Oscillation In a Magnetized Medium: A Covariant Treatment