2018 Impact factor 4.843
Particles and Fields
Eur. Phys. J. C 7, 149-158
DOI 10.1007/s100529800982

Axion decay in a constant electromagnetic background field
and at finite temperature using world-line methods

M. Haack1 - M.G. Schmidt2

1 Institut für Theoretische Physik, Martin-Luther-Universität Halle-Wittenberg, Selkestr. 9, D-06099 Halle, Germany
(e-mail: michael@hera2.physik.uni-halle.de)
2 Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 16, D-69120 Heidelberg, Germany
(e-mail: M.G.Schmidt@thphys.uni-heidelberg.de)

Received: 18 June 1998 / Published online: 19 October 1998

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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