Axion Decay of a Photon in an External Electromagnetic Field
classification
✦ hep-ph
keywords
photonaxiondecayelectromagneticexternalfieldgammaparticle
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An interaction of a pseudoscalar particle with two photons induced by an external electromagnetic field is used to study the photon decay $\gamma \to \gamma a$ where a is a pseudoscalar particle associated with the Peccei-Quinn U(1) symmetry. The field-induced axion emission by photon is analyzed as a possible source of energy losses by astrophysical objects.
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