Münster 2011 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 56: Schwerionenkollisionen und QCD Phasen VII
HK 56.9: Vortrag
Donnerstag, 24. März 2011, 18:45–19:00, HS AP
Cluster formation and dissolution in a generalized relativistic density functional approach for dense matter — •Stefan Typel1,2,3, Maria Voskresenskaya3, Gerd Röpke4, David Blaschke5, Thomas Klähn5, and Hermann Wolter1,6 — 1Excellence Cluster Universe — 2TU München — 3GSI Darmstadt — 4Universität Rostock — 5Universität Wrocław — 6LMU München
The formation and dissolution of clusters in dense matter is described by combining a microscopic quantum statistical approach with a relativistic mean-field (RMF) model with density-dependent nucleon-meson couplings. Nucleons and light clusters are treated as effective degrees of freedom with medium dependent properties. The resulting generalized relativistic density functional successfully describes the transition from clusterized matter at low densities and low temperatures to uniform neutron-proton matter at high densities and high temperatures. In addition to bound state correlations, two-body scattering correlations are included in a schematic way. The formation of heavy clusters is modeled by employing inhomogeneous calculations within the Thomas-Fermi approximation in spherical Wigner-Seitz cells. In the low-density limit, a comparison to the virial equation of state leads to new constraints on the nucleon-meson couplings of the RMF model.