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arXiv · 2410.18791

Transport coefficients of chiral fluid dynamics using low-energy effective models

Pedro Nogarolli·Gabriel S. Denicol·Eduardo S. Fraga
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Abstract

We investigate the first-order transport coefficients of a fluid made of quasiparticles with a temperature-dependent mass extracted from chiral models. We describe this system using an effective kinetic theory, given by the relativistic Boltzmann equation coupled to a temperature-dependent background field determined from the thermal masses. We then simplify the collision term using the relaxation time approximation and implement a Chapman-Enskog expansion to calculate all first-order transport coefficients. In particular, we compute the bulk and shear viscosities using thermal masses extracted from the linear sigma model coupled with constituent quarks and the NJL model.

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Pedro Nogarolli, Gabriel S. Denicol, Eduardo S. Fraga. 2024-10-24. Transport coefficients of chiral fluid dynamics using low-energy effective models. https://doi.org/10.1103/wdfm-gsgg

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