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Axion Decay in a Constant Electromagnetic Background Field and at Finite Temperature using World-line Methods

Michael Haack, Michael G. Schmidt

hep-tharXiv:hep-th/9806138

Abstract

We investigate the radiative decay of the axion into two photons in an external electromagnetic field to one loop order. Our approach is based on the world-line formalism, which is very suitable to take into account the external field to all orders. Afterwards we discuss how the calculation could be generalized to finite temperature.

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