CERN Accelerating science

Article
Report number	hep-ph/0005282
Title	Photon-Photon Interaction in a Photon Gas
Related title	PHOTON PHOTON
Author(s)	Thoma, Markus H. (CERN ; Giessen U.)
Publication	2000
Imprint	2000-05
Number of pages	8
In:	Europhys. Lett. 52 (2000) 498
DOI	10.1209/epl/i2000-00465-1
Subject category	Particle Physics - Phenomenology
Abstract	Using the effective Lagrangian for the low energy photon-photon interaction the lowest order photon self energy at finite temperature and in non-equilibrium is calculated within the real time formalism. The Debye mass, the dispersion relation, the dielectric tensor, and the velocity of light following from the photon self energy are discussed. As an application we consider the interaction of photons with the cosmic microwave background radiation.

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