Modeling global event properties using hydrodynamics from RHIC to LHC

TL;DR

This paper applies relativistic hydrodynamics to model the expansion of dense matter in heavy-ion collisions, providing insights into the fluid's properties and initial fluctuations based on experimental data from RHIC and LHC.

Contribution

It demonstrates the effectiveness of hydrodynamic models in describing collision observables and explores the impact of initial energy density fluctuations.

Findings

Hydrodynamic models fit transverse momentum spectra and flow data.

Constraints on the equation of state and viscosity from experimental observables.

Initial energy density fluctuations influence the evolution and observed particle distributions.

Abstract

The relativistic hydrodynamic model is applied to describe the expansion of the dense matter formed in relativistic heavy-ion collisions. The hydrodynamic expansion of the fluid, supplemented with the statistical emission of hadrons at freeze-out gives a satisfactory description of the observables for particles emitted with soft momenta. Experimental data for the transverse momentum spectra, elliptic flow and interferometry radii give constraints on the properties of the fluid, its equation of state and viscosity coefficients. The role of the fluctuations of the initial profile of the energy density is discussed.