Axion Emission by Magnetic-Field Induced Conversion of Longitudinal Plasmons

Physics – High Energy Physics – High Energy Physics - Phenomenology

Scientific paper

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5 pages, REVTEX, 3 eps figs included

Scientific paper

10.1103/PhysRevD.58.055008

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.

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