Non-equilibrium symmetry restoration beyond one loop

Details Non-equilibrium symmetry restoration beyond one loop Non-equilibrium symmetry restoration beyond one loop

1996-04-30

arxiv.org/abs/hep-ph/9604444v1

Phys.Lett. B385 (1996) 57-62

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex, 12 pages, 2 postscript figures

Scientific paper

10.1016/0370-2693(96)00882-9

We calculate the strength of symmetry restoration effects in highly non-equilibrium states which can arise, for example, during preheating after inflation. We show that in certain parameter range the one-loop results are unstable, requiring summation of multiloop diagrams. We solve this problem for the $O(N)$ model in the large $N$-limit and show that the symmetry restoration may be less effective than what predicted by the one-loop estimate.

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