Study of the gluon propagator in the large-N_f limit at finite temperature and chemical potential for weak and strong couplings
arXiv:hep-ph/0508317 · doi:10.1016/j.aop.2005.11.012
Abstract
At finite temperature and chemical potential, the leading-order (hard-thermal-loop) contributions to the gauge-boson propagator lead to momentum-dependent thermal masses for propagating quasiparticles as well as dynamical screening and Landau damping effects. We compare the hard-thermal-loop propagator with the complete large-N_f gluon propagator, for which the usually subleading contributions, such as a finite width of quasiparticles, can be studied at nonperturbatively large effective coupling. We also study quantitatively the effect of Friedel oscillations in low-temperature electrostatic screening.
REVTEX, 23 pages, 20 figures