Pion transverse momentum spectrum, elliptic flow and interferometry in the granular source model for RHIC and LHC heavy ion collisions

TL;DR

This paper uses the granular source model to analyze pion spectra, flow, and interferometry in heavy ion collisions at RHIC and LHC, successfully matching experimental data and revealing regularities in source parameters.

Contribution

It demonstrates that the granular source model can accurately reproduce experimental results across different energies and centralities, providing insights into source structure and dynamics.

Findings

Model reproduces experimental spectra, flow, and HBT radii

Parameters show regularities with collision centrality and energy

Source structure and expansion velocities are characterized

Abstract

We systematically investigate the pion transverse momentum spectrum, elliptic flow, and Hanbury-Brown-Twiss (HBT) interferometry in the granular source model for the heavy ion collisions of Au-Au at $\sqrt{s_{NN}}=$ 200 GeV and Pb-Pb at $\sqrt{s_{NN}}=$ 2.76 TeV with different centralities. The granular source model can well reproduce the experimental results of the heavy ion collisions at the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC). We examine the parameters involved in the granular source model. The experimental data of the momentum spectrum, elliptic flow, and HBT radii for the two collision energies and different centralities impose very strict constraints on the model parameters. They exhibit certain regularities for collision centrality and energy. The space-time structure and expansion velocities of the granular sources for the heavy ion collisions at the RHIC and LHC energies with different centralities are investigated.