Interferometry radii in heavy-ion collisions at 200GeV and 2.76TeV

TL;DR

This paper models the expansion of fireballs in heavy-ion collisions at different energies using viscous hydrodynamics, successfully reproducing interferometry radii and highlighting the impact of pre-equilibrium flow.

Contribution

It introduces a detailed viscous hydrodynamics model that accurately predicts interferometry radii across multiple collision energies, with improvements from pre-equilibrium flow considerations.

Findings

Model reproduces interferometry radii well at both energies

Pre-equilibrium flow slightly improves low-energy results

Hydrodynamic modeling effectively describes fireball expansion

Abstract

The expansion of the fireball created in Au-Au collisions at 200GeV and Pb-Pb collisions at 2.76TeV is modelled using the relativistic viscous hydrodynamics. The experimentally observed interferometry radii are well reproduced. Additional pre-equilibrium flow improves slightly the results for the lower energies studied.