Dresden 2013 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 30: Schwerionenkollisionen und QCD Phasen

HK 30.6: Vortrag

Dienstag, 5. März 2013, 15:30–15:45, HSZ-204

Temperature dependence of the quark propagator within a Dyson-Schwinger approach — •Marco Viebach, Thomas Hilger, and Burkhard Kämpfer — TU Dresden and Helmholtz-Zentrum Dresden-Rossendorf, D-01328 Dresden, Germany

We present calculations of the quark propagator within the Dyson-Schwinger equations (DSEs) at non-zero temperature for various quark masses. Using a phenomenological gluon propagator and the rainbow approximation to truncate the DSEs the analytical structure is examined for temperature effects. The loci of singularities in the complex momentum plane potentially characterize the phase state with respect to chiral symmetry and confinement.

The chiral condensate and the dual condensate offer measures of the chiral and the deconfinement transition, respectively. They are studied as a function of the temperature and compared with other quantities characterizing the quark propagator.

The results of the DSEs serve as input for the Bethe-Salpeter equation, which provides an access to the meson spectrum and temperature driven medium modifications.

The work is supported by BMBF.