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HK: Fachverband Physik der Hadronen und Kerne
HK 14: Theorie
HK 14.2: Vortrag
Dienstag, 13. März 2007, 14:30–14:45, C
QCD quasi-particle model with widths and Landau damping — •Robert Schulze1, Marcus Bluhm2, and Burkhard Kämpfer1,2 — 1Institut für Theoretische Physik, TU Dresden, 01062 Dresden, Germany — 2Forschungszentrum Dresden-Rossendorf, PF 510119, 01314 Dresden, Germany
The equation of state is a central issue for describing the hydrodynamical expansion of strongly interacting matter in relativistic heavy-ion collisions, say at RHIC or LHC energies. Lattice QCD provides important information on the equation of state. We show how a chain of systematic approximations carries us from QCD to a quasi-particle model which accommodates lattice QCD results, e.g. the entropy, on a quantitative level. This approach allows for extrapolation into a region of finite baryon density not yet accessible to lattice calculations. The importance of finite width effects and the Landau damping is centralized.
We also discuss a family of equations of state suitable for RHIC and LHC energies and test the sensitivity of transversal momentum spectra and differential elliptic flow.