Berlin 2005 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 34: Theorie

HK 34.3: Vortrag

Dienstag, 8. März 2005, 17:00–17:15, TU MA042

Dynamical screening of non-Fermi-Liquid effect at finite temperature — •Kai Hebeler and Bengt Friman — GSI, 64291 Darmstadt, Planckstr. 1

We explore quark matter at high densities and low tempertaures in the Hard Dense Loop approximation. As is well known at zero temperture, due to the lack of screening for transverse gauge bosons, the quasiparticle strength vanishes for states at the Fermi surface. Consequently such a system is formally not a normal Fermi liquid. However, since the corresponding singularity is logarithmic, we show that the normal Fermi-liquid behaviour can be restored by taking finite temperature effects into account.