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2012-01-18

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/131788

Photon propagation in a cold axion background with and without magnetic field

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https://doi.org/10.1103/PhysRevD.85.025010

Abstract

A cold relic axion condensate resulting from vacuum misalignment in the early Universe oscillates with a frequency m , where m is the axion mass. We determine the properties of photons propagating in a simplified version of such a background where the sinusoidal variation is replaced by a square wave profile. We prove that previous results, which indicated that charged particles moving fast in such a background radiate (originally derived assuming that all momenta involved were much larger than m ), hold for long wavelengths, too. We also analyze in detail how the introduction of a magnetic field changes the properties of photon propagation in such a medium. We briefly comment on possible astrophysical implications of these results.

Subject

Física de partícules, Experiments, Fotons

Subject (English)

Particle physics, Experiments, Photons

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Articles publicats en revistes (Física Quàntica i Astrofísica)

Citation

ESPRIU, D. (Domènec) and RENAU CERRILLO, Albert. Photon propagation in a cold axion background with and without magnetic field. Physical Review D. 2012. Vol. 85, num. 2, pags. 025010. ISSN 1550-7998. [consulted: 14 of August of 2026]. Available at: https://hdl.handle.net/2445/131788

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