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Transport Coefficients of Transient Hydrodynamics for the Hadron-resonance Gas and Thermal-mass Quasiparticle Models by Rocha, Gabriel S.; Denicol, Gabriel S. is a scholarly article available to read on EtoBox.

What is Transport Coefficients of Transient Hydrodynamics for the Hadron-resonance Gas and Thermal-mass Quasiparticle Models about?

We calculate all transport coefficients of second order transient hydrodynamics in two effective kinetic theory models: a hadron-resonance gas and a quasiparticle model with thermal masses tuned to reproduce QCD thermodynamics. We compare the corresponding results with calculations for an ultrarelativistic single-component gas, that are widely employed in hydrodynamic simulations of heavy ion collisions. We find that both of these effective models display a qualitatively different normalized bulk viscosity, when compared to the calculation for the single-component gas. Indeed, $\zeta/[\tau_{\Pi}(\varepsilon_{0} + P_{0})] \simeq 16.91(1/3-c_{s}^{2})^{2}$, for the hadron-resonance gas model, and $\zeta/[\tau_{\Pi}(\varepsilon_{0} + P_{0})] \simeq 5 (1/3-c_{s}^{2})$ for the quasiparticle model. Differences are also observed for many second-order transport coefficients, specially those related to the bulk viscous pressure. The transport coefficients derived are shown to be consistent with fundamental linear stability and causality conditions.

Author

Rocha, Gabriel S.; Denicol, Gabriel S.

Published

2024

Language

EN