Diffusion of conserved charges in relativistic heavy ion collisions

  • We discuss the diffusion currents occurring in a dilute system and show that the charge currents do not only depend on gradients in the corresponding charge density, but also on the other conserved charges in the system—the diffusion currents are therefore coupled. Gradients in one charge thus generate dissipative currents in a different charge. In this approach, we model the Navier-Stokes term of the generated currents to consist of a diffusion coefficient matrix, in which the diagonal entries are the usual diffusion coefficients and the off-diagonal entries correspond to the coupling of different diffusion currents. We evaluate the complete diffusion matrix for a specific hadron gas and for a simplified quark-gluon gas, including baryon, electric and strangeness charge. Our findings are that the off-diagonal entries can range within the same magnitude as the diagonal ones.

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Author:Jan A. FotakisORCiD, Moritz Greif, Gabriel S. Denicol, Carsten GreinerGND
Parent Title (English):Proceedings
Place of publication:Basel
Document Type:Conference Proceeding
Year of Completion:2019
Date of first Publication:2019/04/17
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2019/10/24
Tag:Diffusion; Heavy Ion Collisions; Multiple Charge Conservation; Transport Theory
Page Number:5
This is an open access article distributed under the Creative Commons Attribution License https://creativecommons.org/licenses/by/4.0/ which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoCreative Commons - Namensnennung 4.0