Equilibration in phi^4 theory in 3+1 dimensions

Details Equilibration in phi^4 theory in 3+1 dimensions Equilibration in phi^4 theory in 3+1 dimensions

2005-03-30

arxiv.org/abs/hep-ph/0503287v2

Phys.Rev. D72 (2005) 025014

Physics

High Energy Physics

High Energy Physics - Phenomenology

32 pages, 14 figures, uses axodraw, minor corrections added

Scientific paper

10.1103/PhysRevD.72.025014

The process of equilibration in phi^4 theory is investigated for a homogeneous system in 3+1 dimensions and a variety of out-of-equilibrium initial conditions, both in the symmetric and broken phase, by means of the 2PI effective action. Two Phi-derivable approximations including scattering effects are used: the two-loop and the ``basketball'', the latter corresponding to the truncation of the 2PI effective action at O(lambda^2). The approach to equilibrium, as well as the kinetic and chemical equilibration is investigated.

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