Axion Bremsstrahlung
classification
🌌 astro-ph
keywords
axionbremsstrahlungordercollisionsconstantcorrespondingcosmiccosmological
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A new mechanism of cosmic axion production is proposed: axion bremsstrahlung from collisions of straight global strings. This effect is of the second order in the axion coupling constant, but the resulting cosmological estimate is likely to be of the same order as that corresponding to radiation from oscillating string loops. This may lead to a further restriction on the axion window.
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