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Köln 2004 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 20: Theory III

HK 20.5: Talk

Tuesday, March 9, 2004, 17:00–17:15, E

Properties of two- and three-quark states in hot and dense matter — •S. Mattiello1, M. Beyer1, S. Strauss1, T. Frederico2, and H.J. Weber31FB Physik, U Rostock, Germany — 2CTA, Sao Jose dos Campos, Brazil — 3U of Virginia, Charlottesville, USA

In the framework of the light front field theory at finite temperature and density we investigate the formation of two- and three-body bound states in quark matter. This approach leads to the dominant medium effects, i.e. the Pauli blocking and the self energy corrections. Utilizing the Nambu-Jona-Lasinio model on the light front we study the chiral restauration and the dependence of pionic properties (mass and decay costante) on the temperature and the chemical potential. The three-quark dynamics is investigated using a scalar zero-range interaction and the results for the dependence on the medium of the three-body mass are presented. The dissociation of the three-quark state as well as the critical temperature of the color-superconducting phase are investigated.
Acknowledgement: Work supported by Deutsche Forschungsgemeinschaft.

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