Photon gas dynamics in the early universe

Details Photon gas dynamics in the early universe Photon gas dynamics in the early universe

2006-09-29

arxiv.org/abs/hep-ph/0609310v3

Phys.Lett.B659:54-57,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, version to appear in Physics Letters B

Scientific paper

10.1016/j.physletb.2007.10.049

Quantum electrodynamics predicts that photons undergo one-loop scattering. The combined effect of this on the behaviour of a photon gas for temperatures above 10^{10} K results in a softening of the equation of state. We calculate the effect this has on the effective equation of state in the early universe, taking into account all the species of the Standard Model. The change to the dynamics of the early universe is discussed.

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