Diffusion coefficient matrix of the strongly interacting quark-gluon plasma

  • We study the diffusion properties of the strongly interacting quark-gluon plasma (sQGP) and evaluate the diffusion coefficient matrix for the baryon (B), strange (S) and electric (Q) charges—κqq′ (q,q′=B,S,Q) and show their dependence on temperature T and baryon chemical potential μB. The nonperturbative nature of the sQGP is evaluated within the dynamical quasiparticle model (DQPM) which is matched to reproduce the equation of state of the partonic matter above the deconfinement temperature Tc from lattice QCD. The calculation of diffusion coefficients is based on two methods: (i) the Chapman-Enskog method for the linearized Boltzmann equation, which allows to explore nonequilibrium corrections for the phase-space distribution function in leading order of the Knudsen numbers as well as (ii) the relaxation time approximation (RTA). In this work we explore the differences between the two methods. We find a good agreement with the available lattice QCD data in case of the electric charge diffusion coefficient (or electric conductivity) at vanishing baryon chemical potential as well as a qualitative agreement with the recent predictions from the holographic approach for all diagonal components of the diffusion coefficient matrix. The knowledge of the diffusion coefficient matrix is also of special interest for more accurate hydrodynamic simulations.

Download full text files

Export metadata

Metadaten
Author:Jan A. FotakisORCiD, Olga SolovevaORCiDGND, Carsten GreinerGND, Olaf Kaczmarek, Elena BratkovskayaORCiDGND
URN:urn:nbn:de:hebis:30:3-632220
DOI:https://doi.org/10.1103/PhysRevD.104.034014
ISSN:2470-0029
Parent Title (English):Physical review D
Publisher:Inst.
Place of publication:Woodbury, NY
Document Type:Article
Language:English
Date of Publication (online):2021/08/16
Date of first Publication:2021/08/16
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2022/05/30
Tag:Diffusion; Nuclear Physics; Particles & Fields; Plasma Physics; Quark-gluon plasma; Relativistic heavy-ion collisions; Relativistic kinetic theory; Strong interaction; Strongly-coupled plasmas; Transport phenomena
Volume:104
Issue:3, art. 4014
Page Number:17
First Page:034014-1
Last Page:034014-17
Note:
Funded by SCOAP. Also the authors acknowledge support by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) through the CRC-TR 211 “Strong-interaction matter under extreme conditions” Project No. 315477589 TRR 211. O. S. and J. A. F. acknowledge support from the Helmholtz Graduate School for Heavy Ion research. Furthermore, we acknowledge support by the Deutsche Forschungsgemeinschaft by the European Unions Horizon 2020 research and innovation program under Grant Agreement No. 824093 (STRONG-2020) and by the COST Action THOR, CA15213.
HeBIS-PPN:496022040
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Sammlungen:Universitätspublikationen
Licence (German):License LogoCreative Commons - Namensnennung 4.0