Conference paper

Publication year: 1998

Pages: 317C-328C

Journal: Nuclear Physics A: Nuclear and Hadronic Physics

Volume number: 638

Issue number: 1-2

ISSN: 0375-9474

DOI Link: https://doi.org/10.1016/S0375-9474(98)00372-8

Conference: 13th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions (Quark Matter 97)

Publisher: Elsevier

Abstract: 

In order to describe properties of an equilibrated quark-gluon plasma, QCD at finite temperature (and density) has to be considered. Besides lattice calculations, which can be applied only to static quantities at zero density, perturbative QCD has been used. At finite temperature, however, serious problems such as infrared divergent and gauge dependent results have been encountered. These difficulties can be (partially) avoided if one starts from effective Green functions constructed by resumming a certain class of diagrams (hard thermal loops). Within the last few years this improved perturbation theory (Braaten-Pisarski method) turned out to be a powerful tool for computing interesting quantities of the quark-gluon plasma phase.

In the present talk a basic introduction to the Braaten-Pisarski method is provided and its applications and limits are reviewed. In particular, damping rates, the energy loss of energetic partons, thermalization times, the viscosity of the quark-gluon plasma, and the production of photons and dileptons are discussed.

Harvard Citation style: Thoma, M. (1998) QCD perturbation theory at finite temperature/density and its application, Nuclear Physics A: Nuclear and Hadronic Physics, 638(1-2), pp. 317C-328C. https://doi.org/10.1016/S0375-9474(98)00372-8

APA Citation style: Thoma, M. (1998). QCD perturbation theory at finite temperature/density and its application. Nuclear Physics A: Nuclear and Hadronic Physics. 638(1-2), 317C-328C. https://doi.org/10.1016/S0375-9474(98)00372-8