TY  - JOUR
AU  - Caputo, A.
AU  - Millar, A. J.
AU  - Vitagliano, E.
PY  - 2020
DA  - 2020//
TI  - Revisiting longitudinal plasmon-axion conversion in external magnetic fields
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 123004
EP  - 13pp
VL  - 101
IS  - 12
PB  - Amer Physical Soc
AB  - 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 (less than or similar to 200 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.
SN  - 1550-7998
UR  - https://arxiv.org/abs/2005.00078
UR  - https://doi.org/10.1103/PhysRevD.101.123004
DO  - 10.1103/PhysRevD.101.123004
LA  - English
N1  - WOS:000537316000001
ID  - Caputo_etal2020
ER  -