Dissipative Hydrodynamic Effects on Baryon Stopping

TL;DR

This paper develops a second order dissipative hydrodynamic model at finite baryon density to study baryon stopping in high-energy heavy ion collisions, highlighting the importance of dissipation effects.

Contribution

It introduces a novel second order dissipative hydrodynamic model including baryon dissipation, shear, and bulk viscosities for high-energy collisions.

Findings

Hydrodynamic evolution reduces baryon stopping.

Net baryon distribution is sensitive to baryon dissipation and viscosities.

Dissipative effects are crucial for understanding the hot medium properties.

Abstract

The quark-gluon plasma is considered to behave as a relativistic viscous fluid in the high-energy heavy ion collisions. In this study, I develop and estimate a second order dissipative hydrodynamic model at finite baryon density with effects of baryon dissipation together with those of shear and bulk viscosities. It is found that the hydrodynamic evolution effectively reduces baryon stopping, suggesting that the collisions are less transparent at the initial stage. Also the net baryon distribution is found sensitive to baryon dissipation as well as to viscosities. The results indicate that the dissipative hydrodynamic modeling would be important for understanding unique properties of the hot medium even in the high-energy collisions.