Transport coefficients for the hot quark-gluon plasma at finite chemical potential μ_B

2019/11/17 by Olga Soloveva, Pierre Moreau, Elena Bratkovskaya · 1 citation
Physics and Astronomy · #nucl-th #hep-ph

paper · pdf · doi:10.1103/physrevc.101.045203

published as Phys. Rev. C 101, 045203 (2020) · 12 pages, 7 figures. arXiv admin note: text overlap with arXiv:1903.10257

arxiv created 2019/11/17 · arxiv updated 2020/04/22

Abstract

We calculate transport coefficients of the quark-gluon plasma (QGP) within the dynamical quasiparticle model (DQPM) by explicitly computing the parton interaction rates as a function of temperature T and baryon chemical potential μ_B on the basis of the DQPM couplings and partonic propagators. The latter are extracted from lattice QCD by matching the equation of state, entropy density and energy density at μ_B= 0. For baryon chemical potentials 0 ≤ μ_B ≤ 500 MeV we employ a scaling Ansatz for the effective coupling which was shown before to lead to thermodynamic consistent results in this range. We compute the ratio of the shear and bulk viscosities to the entropy density, i.e. η/s and ζ/s, the electric conductivity σ₀/T as well as the baryon diffusion coefficient κ_B and compare to related approaches from the literature. We find that the ratios η/s and ζ/s as well as σ₀/T are in accord with the results from lattice QCD at μ_B=0 and only weakly depend on the ratio T/T_c(μ_B) where T_c(μ_B) denotes the critical temperature at finite baryon chemical potential.

Citations

• Exploring the partonic phase at finite chemical potential within an extended off-shell transport approach

Cited by

• Transport coefficients of strongly interacting quark-gluon plasma including elastic and inelastic scattering within the dynamical quasiparticle model