Axion Emission by Magnetic-Field Induced Conversion of Longitudinal Plasmons

Abstract

Magnetic fields mix axions with photons, allowing for the cyclotron process e -> e + a by virtue of an intermediate plasmon even if axions do not couple to electrons at tree level. The axion and longitudinal-plasmon dispersion relations always cross for a certain wave number, leading to a resonant enhancement of this process. Even then, however, it cannot quite compete with the usual nucleon processes in a supernova core. The well-known axion window 10^{-5} eV < m_a < 10^{-2} eV remains open and axions may still constitute the cosmic dark matter.

5 pages, REVTEX, 3 eps figs included

References in corpus (3)

• Results from a High-Sensitivity Search for Cosmic Axions
• Asymmetric neutrino emision and formation of rapidly moving pulsars
• Axion cyclotron emissivity of magnetized white dwarfs and neutron stars

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• Radiation backreaction in axion electrodynamics
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• Exploring scalar-photon interactions in energetic astrophysical events
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• Field-induced axion decay $a\to e^{+}{e}^{-}$ in plasma
• Axion-like Particles from Hypernovae
• Field-induced interaction of a pseudoscalar particle with photon in a magnetized $e^{-}{e}^{+}$ plasma
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• On the photon-pseudoscalar particle mixing in media and external fields