Study of the gluon propagator in the large-N_f limit at finite temperature and chemical potential for weak and strong couplings

Details Study of the gluon propagator in the large-N_f limit at finite temperature and chemical potential for weak and strong couplings Study of the gluon propagator in the large-N_f limit at finite temperature and chemical potential for weak and strong couplings

2005-08-31

arxiv.org/abs/hep-ph/0508317v1

Annals Phys. 321 (2006) 2128-2155

Physics

High Energy Physics

High Energy Physics - Phenomenology

REVTEX, 23 pages, 20 figures

Scientific paper

10.1016/j.aop.2005.11.012

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.

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