Towards a Quantum Transport Description of Particles with finite Mass Width
Abstract
The effects of the propagation of particles which have a finite life time and an according width in their mass spectrum are discussed in the context of transport descriptions. In the first part the coupling of soft photon modes to a source of charged particles is studied in a classical model which can be solved completely in analytical terms. The solution corresponds to a re-summation of certain field theory diagrams. The second part addresses the derivation of transport equations which also account for the damping width of the particles. The -derivable method of Baym is used to derive a self-consistent and conserving scheme. For this scheme a conserved energy-momentum tensor can be constructed. Furthermore, a kinetic entropy can be derived which besides the standard quasi-particle part also includes contributions from fluctuation.
Keywords
Cite
@article{arxiv.hep-ph/9809419,
title = {Towards a Quantum Transport Description of Particles with finite Mass Width},
author = {J. Knoll and Yu. B. Ivanov and D. N. Voskresensky},
journal= {arXiv preprint arXiv:hep-ph/9809419},
year = {2013}
}
Comments
Talk presented by J.K. at the Thermal-Field-Theory Workshop, TFT 98, Regensburg/Germany, Aug. 10-15, 1998; 10 pages, 2 ps-figures (revised version: a few references have been added according to the referee's suggestion)