Modeling of two-particle femtoscopic correlations at top RHIC energy

TL;DR

This paper uses the UrQMD model to calculate and analyze two-particle femtoscopic correlations of pions in various collision systems at RHIC energies, providing insights into the source size and dynamics.

Contribution

It presents a detailed simulation-based study of pion femtoscopic correlations at RHIC energies using UrQMD, comparing results with experimental data.

Findings

Source radii are consistent with experimental measurements.

Correlation functions vary with transverse mass.

Model reproduces key features of femtoscopic correlations.

Abstract

The spatial and temporal characteristics of particle emitting source produced in particle and/or nuclear collisions can be measured by using two-particle femtoscopic correlations. These correlations arise due to quantum statistics, Coulomb and strong final state interactions. In this paper we report on the calculations of like-sign pion femtoscopic correlations produced in p+p, p+Au, d+Au, Au+Au at top RHIC energy using Ultra Relativistic Quantum Molecular Dynamics Model (UrQMD). Three-dimensional correlation functions are constructed using the Bertsch-Pratt parametrization of the two-particle relative momentum. The correlation functions are studied in several transverse mass ranges. The emitting source radii of charged pions, Rout , Rside , Rlong , are obtained from Gaussian fit to the correlation functions and compared to data from the STAR and PHENIX experiments.