Three-dimensional sizes and shapes of pion emission in heavy-ion collisions

TL;DR

This paper analyzes the three-dimensional shape of pion emission sources in heavy-ion collisions using simulations and compares results with recent experimental data to enhance understanding of pion emission phenomena.

Contribution

It provides a detailed three-dimensional analysis of pion sources in simulations and compares these with recent experimental measurements, advancing phenomenological understanding.

Findings

Levy-stable distributions effectively describe two-pion source shapes.

Simulation results show good agreement with PHENIX experimental data.

The study offers insights into the geometry of pion emission in heavy-ion collisions.

Abstract

In the era of precision measurements in high-energy heavy-ion physics, there is an increasing expectation towards phenomenological and theoretical studies to provide a better description of data. In recent years, multiple experiments have confirmed through two-pion Bose-Einstein correlation measurements that the shape of the two-pion pair source can be well described by Levy-stable distributions. However, direct comparisons of new phenomenological results with the data are still needed to understand the underlying phenomena and learn more about the nature of pion emission. In this paper, we present a three-dimensional analysis of the two-pion source in Monte-Carlo simulations of Au+Au collisions at 200 GeV per nucleon collision energy, and discuss a detailed comparison with the most recent centrality-dependent measurements from the PHENIX Collaboration.