Bonn 2020 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 51: Poster (a)

HK 51.2: Poster

Donnerstag, 2. April 2020, 16:30–18:30, Zelt

Charge diffusion coefficient calculations of the hot hadron gas — •Philip A. Karan1,2, Jean-Bernard Rose1,2, Jan A. Fotakis2, Moritz Greif2, Hannah Elfner1,2,3, Carsten Greiner2, and Jan Hammelmann1,21Frankfurt Institute for Advanced Studies, Ruth-Moufang-Strasse 1, 60438 Frankfurt am Main, Germany — 2Institute for Theoretical Physics, Goethe University, Max-von-Laue-Strasse 1, 60438 Frankfurt am Main, Germany — 3GSI Helmholtzzentrum für Schwerionenforschung, Planckstrasse 1, 64291 Darmstadt, Germany

To characterize the hot and dense nuclear matter, transport coefficients like the baryon, electric and strangeness charge diffusion are important to know. The interaction of these different charges lead to a diffusion matrix which has been previously suggested in Fotakis et. al. [1711.08680v1] as the cross-charge diffusion. We calculate the coefficients at temperatures in and below the region of the expected phase transition to the QGP using the SMASH transport code that simulates the hadron gas and the Green-Kubo formalism to extract the coefficients. After validating the approach for simple systems we gradually increase the number of degrees of freedom until we reach the full hadronic resonance gas as described by our current knowledge. Our results show that there are significant differences in the temperature dependence of the different components of the diffusion matrix and that a charge*s diffusion current is strongly not only affected by the gradients of their corresponding charge current, but also by the other charges* gradients. This result can be used to provide input to hydrodynamics which take conserved charges into account.

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