Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
HK: Fachverband Hadronen und Kerne
HK 33: Heavy Ion Collisions and QCD phases
HK 33.1: Gruppenbericht
Dienstag, 17. März 2009, 16:30–17:00, H-ZO 10
A globally invariant chiral model with (axial-)vector mesons — •Francesco Giacosa1, Susanna Gallas1,2, Achim Heinz1, Stefan Strüber1, Denis Parganlija1, and Dirk H. Rischke1,2 — 1Institute for Theoretical Physics, Goethe University, Max-von-Laue-Str. 1, Frankfurt am Main, D-60438 Germany — 2Frankfurt Institute for Advanced Studies, Goethe University, Ruth-Moufang-Str. 1, Frankfurt am Main, D-60438 Germany
A model with linear realization of chiral symmetry and with the inclusion of vector and axial-vector mesons is presented in the two-flavor case. The nucleon and its chiral partner are introduced in the so-called mirror assignment. After a brief discussion about the motivation and the development of the model in the vacuum, the attention is focused on some hotly debated issues: (i) The nature of light scalar mesons and their role at nonzero temperature. (ii) The dependence of the ρ and the nucleon mass on the chiral condensate. (iii) An outlook on future research: inclusion of the scalar glueball, extension to three- and four-flavor cases and the quarkyonic matter at nonzero density. The aim is a simultaneous description of vacuum properties of hadrons, such as decays and scattering lengths, and the nonzero temperature and density behavior of a hadron gas.