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HK: Fachverband Physik der Hadronen und Kerne

HK 21: Schwerionenkollisionen und QCD Phasen

HK 21.5: Vortrag

Dienstag, 20. März 2012, 17:45–18:00, P 5

Finite-volume effects in the chiral phase diagram — •Ralf-Arno Tripolt¹, Bernd-Jochen Schaefer^2,3, and Lorenz von Smekal¹ — ¹Institut für Kernphysik, Technische Universität Darmstadt, Germany — ²Institut für Physik, Karl-Franzens-Universität Graz, Austria — ³Institut für Theoretische Physik, Justus-Liebig-Universität Giessen, Germany

We investigate effects of a finite volume on the phase diagram of a two-flavor quark-meson model. Using a non-perturbative functional renormalization group approach, both quark and meson fluctuation effects are inlcuded. The corresponding flow equation for a finite system is presented and solved numerically with the grid technique.

In particular, we show results for the critical endpoint and thermodynamic observables. Moreover, critical properties of the finite-volume phase structure are studied by calculating the quark number denstiy and quark number susceptibility [1].

[1] Ralf-Arno Tripolt, Jens Braun, Bertram Klein, Bernd-Jochen Schaefer, in preparation.