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HK: Fachverband Hadronen und Kerne

HK 55: Heavy Ion Collisions and QCD phases

HK 55.2: Invited Group Report

Wednesday, March 18, 2009, 17:00–17:30, H-ZO 10

Hadronic matter at finite baryon densities - what do we know about it? — •Yvonne Leifels — GSI Darmstadt

Hadronic matter is a subject of intensive investigations both experimentally and theoretically over the last two decades. In the energy range of the Heavy Ion Synchrotron at GSI nuclear matter densities of 2 - 3 times normal nuclear matter density at relative moderate temperatures are created in relativistic heavy ion collisions. A multitude of phenomenons have been observed, i.e. collective flow, stopping and particle production, which have been confronted to the predictions of theoretical models to investigate the constraints on the bulk characteristics of nuclear matter. Strange particle production, in particular charged kaons, at energies close to the production threshold in NN-collisions is sensitive not only to the nuclear equation of state but also to the modification of hadron properties in the hot and dense medium. In trying to describe in addition the strangeness degree of freedom evidence was produced that strange particle properties are influenced by the surrounding baryonic medium.

The current status of understanding the bulk properties of hadronic matter and the in-medium modifications of the constituents will be discussed.