Axion Decay in a Constant Electromagnetic Background Field and at Finite Temperature using World-line Methods
arXiv:hep-th/9806138 · doi:10.1007/s100529800982
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.
27 pages, 4 figures, corrected and added some references and added some remarks to appendix D