The quarkgluon plasma in equilibrium
Abstract
Our current knowledge of the quarkgluon plasma in thermodynamical equilibrium is reviewed. The phase diagram of strongly interacting matter is discussed, with emphasis on the quarkhadron phase transition and the coloursuperconducting phases of quark matter. Lattice quantum chromodynamics results on the order of the phase transition, the thermodynamical functions, the heavy quark free energy, mesonic spectral functions, and recent results for nonzero quark chemical potential are presented. Analytic attempts to compute the thermodynamical properties of strongly interacting matter, such as perturbation theory, quasiparticle models, “hardthermalloop”resummed perturbation theory, the Polyakovloop model, as well as linear sigma models are discussed. Finally, coloursuperconducting quark matter is considered in the limit of weak coupling. The gap equation and the excitation spectrum are derived. The solution of the gap equation, gap parameters in various coloursuperconducting phases, and critical temperatures for the transition to normalconducting quark matter are presented. A summary of gluon and photon properties in colour superconductors is given.
 Publication:

Progress in Particle and Nuclear Physics
 Pub Date:
 March 2004
 DOI:
 10.1016/j.ppnp.2003.09.002
 arXiv:
 arXiv:nuclth/0305030
 Bibcode:
 2004PrPNP..52..197R
 Keywords:

 Nuclear Theory;
 High Energy Physics  Phenomenology;
 Nuclear Experiment
 EPrint:
 89 pages, 26 figures, review for Prog. Part. Nucl. Phys, minor revisions to text, correction of typos, refs. added