Problems of Perturbation Series in Non-Equilibrium Quantum Field Theories
High Energy Physics - Phenomenology
2016-09-01 v1
Abstract
In the standard framework of non-equilibrium quantum field theories, the pinch singularities associated to multiple products of -functions do not cancel in a perturbative expansion unless the particle distributions are those for a system in thermal and chemical equilibrium.
Keywords
Cite
@article{arxiv.hep-ph/9405396,
title = {Problems of Perturbation Series in Non-Equilibrium Quantum Field Theories},
author = {T. Altherr and D. Seibert},
journal= {arXiv preprint arXiv:hep-ph/9405396},
year = {2016}
}
Comments
10 pages, 2 figures, Cern preprint CERN-TH.7271/94