Axion Decay of a Photon in an External Electromagnetic Field
N. V. Mikheev, A. Ya. Parkhomenko, L. A. Vassilevskaya
Abstract
An interaction of a pseudoscalar particle with two photons induced by an external electromagnetic field is used to study the photon decay γ γa 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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