Infrared and light-cone limit in hot QED

Details Infrared and light-cone limit in hot QED Infrared and light-cone limit in hot QED

1998-09-24

arxiv.org/abs/hep-ph/9809516v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, RevTeX, 2 eps figures. Contribution to the proceedings of the 5th International Workshop on Thermal Field Theories an

Scientific paper

In hot gauge theories a breakdown of the hard thermal loop expansion occurs for light-like external momenta or in the infrared region. In QED where a resummation of ladder diagrams is usually advocated, it is shown that long range magnetic interations involve a broader set of graphs. The consequence is a generalized compensation of the hard modes damping terms at leading order in the infrared limit and near the light-cone. The relevance of the so-called improved hard thermal loop resummation scheme is discussed.

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