Berlin 2005 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 5: Theorie

HK 5.8: Vortrag

Freitag, 4. März 2005, 15:45–16:00, TU MA005

Densitiy Dependence of Four-Quark Condensates: Evaluation of QCD Sum-Rules for the Nucleon and Light Vector Mesons — •Ronny Thomas^1,2, Sven Zschocke^1,2, and Burkhardt Kämpfer¹ — ¹Forschungszentrum Rossendorf, Dresden, Germany — ²TU Dresden, Germany

QCD sum-rules for the nucleon and the light vector mesons are revisited with emphasis on the role of four-quark condensates. Often the factorization hypothesis is used to predict hadronic properties at finite baryon density. Distinct occurence of the four-quark condensates in sum-rules for the nucleon and light vector mesons imply further understanding of their density dependence. Prospects to constrain some four-quark condensates by di-electron measurements at HADES are discussed.