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arXiv · 1305.7180

Transport coefficients from the Nambu-Jona-Lasinio model for $SU(3)_f$

Rudy Marty·Elena Bratkovskaya·Wolfgang Cassing·Jörg Aichelin·Hamza Berrehrah
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Abstract

We calculate the shear $η(T)$ and bulk viscosities $ζ(T)$ as well as the electric conductivity $σ_e(T)$ and heat conductivity $κ(T)$ within the Nambu-Jona-Lasinio model for 3 flavors as a function of temperature as well as the entropy density $s(T)$, pressure $P(T)$ and speed of sound $c_s^2(T)$. We compare the results with other models such as the Polyakov-Nambu-Jona-Lasinio (PNJL) model and the dynamical quasiparticle model (DQPM) and confront these results with lattice QCD data whenever available. We find the NJL model to have a limited predictive power for the thermodynamic variables and various transport coefficients above the critical temperature whereas the PNJL model and DQPM show acceptable results for the quantities of interest.

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Rudy Marty, Elena Bratkovskaya, Wolfgang Cassing, Jörg Aichelin, Hamza Berrehrah. 2013-11-13. Transport coefficients from the Nambu-Jona-Lasinio model for $SU(3)_f$. https://doi.org/10.1103/physrevc.88.045204

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