Equilibration in phi^4 theory in 3+1 dimensions
arXiv:hep-ph/0503287 · doi:10.1103/PhysRevD.72.025014
Abstract
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.
32 pages, 14 figures, uses axodraw, minor corrections added