Departure from equilibrium of the quasiparticle distribution functions in high-energy nuclear collisions

P. Chakraborty, J. I. Kapusta

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

In simulations of high energy heavy ion collisions that employ viscous hydrodynamics, single particle distributions are distorted from their thermal equilibrium form due to gradients in the flow velocity. These are closely related to the formulas for the shear and bulk viscosities in the quasiparticle approximation. Distorted single particle distributions are now commonly used to calculate the emission of photons and dilepton pairs, and in the late stage to calculate the conversion of a continuous fluid to individual particles. We show how distortions of the single particle distribution functions due to both shear and bulk viscous effects can be done rigorously in the quasiparticle approximation and illustrate it with the linear σ model at finite temperature.

Original languageEnglish (US)
Article number014907
JournalPhysical Review C
Volume95
Issue number1
DOIs
StatePublished - Jan 19 2017

Bibliographical note

Publisher Copyright:
© 2017 American Physical Society.

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