Dissipative hydrodynamic effects on the quark-gluon plasma at finite baryon density

TL;DR

This paper develops a causal dissipative hydrodynamic model at finite baryon density for quark-gluon plasma in heavy ion collisions, revealing how baryon flow affects rapidity distribution and collision transparency.

Contribution

It introduces a novel hydrodynamic model incorporating baryon dissipation effects at finite density, enhancing understanding of net baryon distribution in high-energy collisions.

Findings

Baryon flow carries net baryon to forward rapidity, increasing collision transparency.

Distribution sensitive to baryon dissipation, shear, and bulk viscosity.

Energy for hot medium production may be underestimated without considering dissipation.

Abstract

The quark-gluon plasma behaves as a relativistic viscous fluid in high-energy heavy ion collisions. I develop a causal dissipative hydrodynamic model at finite baryon density for RHIC and LHC to estimate the net baryon rapidity distribution. The net baryon number is found to be carried to forward rapidity by the flow, effectively enhancing the transparency of the collisions. This suggests that the energy available for the production of a hot medium could be larger than that naively implied from experimental data. Also the distribution can be sensitive to baryon dissipation as much as to shear and bulk viscosity.