Journalartikel

Jahr der Veröffentlichung: 2005

Zeitschrift: Physical Review Letters

Bandnummer: 94

Heftnummer: 17

ISSN: 0031-9007

eISSN: 1079-7114

Open Access Status: Green

DOI Link: https://doi.org/10.1103/PhysRevLett.94.172301

Verlag: American Physical Society

Abstract: 
We study properties of a gluon plasma above the critical temperature T-c in a generalized quasiparticle approach with a Lorentz spectral function. The model parameters are determined by a fit of the entropy s to lattice QCD data. The effective degrees of freedom are found to be rather heavy and of a sizable width. With the spectral width being closely related to the interaction rate, we find a large effective cross section, which is comparable to the typical distance squared of the quasiparticles. This suggests that the system should be viewed as a liquid as also indicated by an estimate of the plasma parameter Gamma. Furthermore, within the quasiparticle approach we find a very low viscosity to entropy ratio, eta/s similar to 0.2 for T > 1.05T(c), supporting the recent conjecture of an almost ideal quark-gluon liquid seen at RHIC.

Harvard-Zitierstil: Peshier, A. and Cassing, W. (2005) The hot nonperturbative gluon plasma is an almost ideal colored liquid, Physical Review Letters, 94(17), Article 172301. https://doi.org/10.1103/PhysRevLett.94.172301

APA-Zitierstil: Peshier, A., & Cassing, W. (2005). The hot nonperturbative gluon plasma is an almost ideal colored liquid. Physical Review Letters. 94(17), Article 172301. https://doi.org/10.1103/PhysRevLett.94.172301