Berlin 2005 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 5: Theorie

HK 5.7: Vortrag

Freitag, 4. März 2005, 15:30–15:45, TU MA005

In-medium four-quark condensates — •Stefan Leupold — Institut für Theoretische Physik, Universität Giessen, Germany

It is well-established for the vacuum case that in the large-N_c limit four-quark condensates factorize into products of the two-quark condensate. Here N_c denotes the number of colors. It is shown that in the combined large-N_c and linear density approximation four-quark condensates do not factorize in a medium of pions (finite temperature system) but do factorize in a medium of nucleons (nuclear system).