Skip to Main content Skip to Navigation
Journal articles

The impact of dissipation and noise on fluctuations in chiral fluid dynamics

Abstract : We investigate the nonequilibrium evolution of the sigma field coupled to a fluid dynamic expansion of a hot fireball to model the chiral phase transition in heavy-ion collisions. The dissipative processes and fluctuations are allowed under the assumption that the total energy of the coupled system is conserved. We use the linear sigma model with constituent quarks to investigate the effects of the chiral phase transition on the equilibration and excitation of the sigma modes. The quark fluid acts as a heat bath in local thermal equilibrium and the sigma field evolves according to a semiclassical stochastic Langevin equation of motion. The effects of supercooling and reheating of the fluid in a first order phase transition are observed via the delayed relaxation of the sigma field to a new equilibrium state. At the first order phase transition the nonequilibrium fluctuations are strongly enhanced.
Document type :
Journal articles
Complete list of metadatas

http://hal.in2p3.fr/in2p3-00821453
Contributor : Dominique Girod <>
Submitted on : Friday, May 10, 2013 - 11:11:22 AM
Last modification on : Wednesday, January 15, 2020 - 1:30:02 PM

Links full text

Identifiers

Citation

Marlene Nahrgang, C. Herold, S. Leupold, I. Mishustin, M. Bleicher. The impact of dissipation and noise on fluctuations in chiral fluid dynamics. Journal of Physics G: Nuclear and Particle Physics, IOP Publishing, 2013, 40, pp.055108. ⟨10.1088/0954-3899/40/5/055108⟩. ⟨in2p3-00821453⟩

Share

Metrics

Record views

344