Landau hydrodynamical model at RHIC and LHC

TL;DR

This paper applies the Landau hydrodynamical model to analyze particle distributions in high-energy heavy-ion collisions at RHIC and LHC, emphasizing the importance of transverse expansion and improved freeze-out conditions.

Contribution

It introduces a more realistic freeze-out condition and uses lattice equation of state within the Landau model to better describe experimental data at RHIC and LHC energies.

Findings

Transverse expansion is crucial for matching observed particle spectra.

Transverse flow increases with collision energy, especially for heavier particles.

The model successfully describes rapidity and transverse spectra at both RHIC and LHC.

Abstract

The rapidity distribution and transverse spectra of most copious particles such as pions, Kaons and antiprotons from central Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV and central Pb+Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV have been investigated in the framework of Landau hydrodynamical model. With a more realistic choice of freeze-out condition and the employment of lattice equation of state, we find transverse expansion of the collision systems is important to explain the observed data. With the increase of collision energy from RHIC to LHC, transverse flow becomes more and more important for hadron production at midrapidity, especially for more massive particle.