The Plasmon in Hot $\phi^4$ Theory
High Energy Physics - Phenomenology
2009-10-09 v1
Abstract
We study the 2-loop resummed propagator in hot theory. The propagator has a cut along the whole real axis in the complex energy plane, but for small , the spectral density is sharply peaked around the plasmon. The dispersion relation and the width of the plasmon are calculated at zero {\em and} finite momentum. At large momenta the spectral width vanishes, and the plasmon looses its collectivity and behaves like a non-interacting free particle.
Cite
@article{arxiv.hep-ph/9509333,
title = {The Plasmon in Hot $\phi^4$ Theory},
author = {Enke Wang and Ulrich Heinz},
journal= {arXiv preprint arXiv:hep-ph/9509333},
year = {2009}
}
Comments
REVTeX, 30 pages, 8 uuencoded ps-figures